20049560

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1$

素因数の和:121

約数の個数: 128

約数和(自身を含む): 52531200

約数和(自身を除く): 32481640

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 23, 31, 37, 38, 40, 46, 62, 74, 76, 92, 95, 115, 124, 148, 152, 155, 184, 185, 190, 230, 248, 296, 310, 370, 380, 437, 460, 589, 620, 703, 713, 740, 760, 851, 874, 920, 1147, 1178, 1240, 1406, 1426, 1480, 1702, 1748, 2185, 2294, 2356, 2812, 2852, 2945, 3404, 3496, 3515, 3565, 4255, 4370, 4588, 4712, 5624, 5704, 5735, 5890, 6808, 7030, 7130, 8510, 8740, 9176, 11470, 11780, 13547, 14060, 14260, 16169, 17020, 17480, 21793, 22940, 23560, 26381, 27094, 28120, 28520, 32338, 34040, 43586, 45880, 52762, 54188, 64676, 67735, 80845, 87172, 105524, 108376, 108965, 129352, 131905, 135470, 161690, 174344, 211048, 217930, 263810, 270940, 323380, 435860, 501239, 527620, 541880, 646760, 871720, 1002478, 1055240, 2004956, 2506195, 4009912, 5012390, 10024780, 20049560]

約数ペア:

[(1, 20049560), (2, 10024780), (4, 5012390), (5, 4009912), (8, 2506195), (10, 2004956), (19, 1055240), (20, 1002478), (23, 871720), (31, 646760), (37, 541880), (38, 527620), (40, 501239), (46, 435860), (62, 323380), (74, 270940), (76, 263810), (92, 217930), (95, 211048), (115, 174344), (124, 161690), (148, 135470), (152, 131905), (155, 129352), (184, 108965), (185, 108376), (190, 105524), (230, 87172), (248, 80845), (296, 67735), (310, 64676), (370, 54188), (380, 52762), (437, 45880), (460, 43586), (589, 34040), (620, 32338), (703, 28520), (713, 28120), (740, 27094), (760, 26381), (851, 23560), (874, 22940), (920, 21793), (1147, 17480), (1178, 17020), (1240, 16169), (1406, 14260), (1426, 14060), (1480, 13547), (1702, 11780), (1748, 11470), (2185, 9176), (2294, 8740), (2356, 8510), (2812, 7130), (2852, 7030), (2945, 6808), (3404, 5890), (3496, 5735), (3515, 5704), (3565, 5624), (4255, 4712), (4370, 4588)]