20421240

素因数分解:

$2^3\times 3^1\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{151}}^1$

素因数の和:202

約数の個数: 192

約数和(自身を含む): 74856960

約数和(自身を除く): 54435720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 23, 24, 28, 30, 35, 40, 42, 46, 49, 56, 60, 69, 70, 84, 92, 98, 105, 115, 120, 138, 140, 147, 151, 161, 168, 184, 196, 210, 230, 245, 276, 280, 294, 302, 322, 345, 392, 420, 453, 460, 483, 490, 552, 588, 604, 644, 690, 735, 755, 805, 840, 906, 920, 966, 980, 1057, 1127, 1176, 1208, 1288, 1380, 1470, 1510, 1610, 1812, 1932, 1960, 2114, 2254, 2265, 2415, 2760, 2940, 3020, 3171, 3220, 3381, 3473, 3624, 3864, 4228, 4508, 4530, 4830, 5285, 5635, 5880, 6040, 6342, 6440, 6762, 6946, 7399, 8456, 9016, 9060, 9660, 10419, 10570, 11270, 12684, 13524, 13892, 14798, 15855, 16905, 17365, 18120, 19320, 20838, 21140, 22197, 22540, 24311, 25368, 27048, 27784, 29596, 31710, 33810, 34730, 36995, 41676, 42280, 44394, 45080, 48622, 52095, 59192, 63420, 67620, 69460, 72933, 73990, 83352, 88788, 97244, 104190, 110985, 121555, 126840, 135240, 138920, 145866, 147980, 170177, 177576, 194488, 208380, 221970, 243110, 291732, 295960, 340354, 364665, 416760, 443940, 486220, 510531, 583464, 680708, 729330, 850885, 887880, 972440, 1021062, 1361416, 1458660, 1701770, 2042124, 2552655, 2917320, 3403540, 4084248, 5105310, 6807080, 10210620, 20421240]

約数ペア:

[(1, 20421240), (2, 10210620), (3, 6807080), (4, 5105310), (5, 4084248), (6, 3403540), (7, 2917320), (8, 2552655), (10, 2042124), (12, 1701770), (14, 1458660), (15, 1361416), (20, 1021062), (21, 972440), (23, 887880), (24, 850885), (28, 729330), (30, 680708), (35, 583464), (40, 510531), (42, 486220), (46, 443940), (49, 416760), (56, 364665), (60, 340354), (69, 295960), (70, 291732), (84, 243110), (92, 221970), (98, 208380), (105, 194488), (115, 177576), (120, 170177), (138, 147980), (140, 145866), (147, 138920), (151, 135240), (161, 126840), (168, 121555), (184, 110985), (196, 104190), (210, 97244), (230, 88788), (245, 83352), (276, 73990), (280, 72933), (294, 69460), (302, 67620), (322, 63420), (345, 59192), (392, 52095), (420, 48622), (453, 45080), (460, 44394), (483, 42280), (490, 41676), (552, 36995), (588, 34730), (604, 33810), (644, 31710), (690, 29596), (735, 27784), (755, 27048), (805, 25368), (840, 24311), (906, 22540), (920, 22197), (966, 21140), (980, 20838), (1057, 19320), (1127, 18120), (1176, 17365), (1208, 16905), (1288, 15855), (1380, 14798), (1470, 13892), (1510, 13524), (1610, 12684), (1812, 11270), (1932, 10570), (1960, 10419), (2114, 9660), (2254, 9060), (2265, 9016), (2415, 8456), (2760, 7399), (2940, 6946), (3020, 6762), (3171, 6440), (3220, 6342), (3381, 6040), (3473, 5880), (3624, 5635), (3864, 5285), (4228, 4830), (4508, 4530)]