20900820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{661}}^1$

素因数の和:721

約数の個数: 96

約数和(自身を含む): 64060416

約数和(自身を除く): 43159596

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 31, 34, 51, 60, 62, 68, 85, 93, 102, 124, 155, 170, 186, 204, 255, 310, 340, 372, 465, 510, 527, 620, 661, 930, 1020, 1054, 1322, 1581, 1860, 1983, 2108, 2635, 2644, 3162, 3305, 3966, 5270, 6324, 6610, 7905, 7932, 9915, 10540, 11237, 13220, 15810, 19830, 20491, 22474, 31620, 33711, 39660, 40982, 44948, 56185, 61473, 67422, 81964, 102455, 112370, 122946, 134844, 168555, 204910, 224740, 245892, 307365, 337110, 348347, 409820, 614730, 674220, 696694, 1045041, 1229460, 1393388, 1741735, 2090082, 3483470, 4180164, 5225205, 6966940, 10450410, 20900820]

約数ペア:

[(1, 20900820), (2, 10450410), (3, 6966940), (4, 5225205), (5, 4180164), (6, 3483470), (10, 2090082), (12, 1741735), (15, 1393388), (17, 1229460), (20, 1045041), (30, 696694), (31, 674220), (34, 614730), (51, 409820), (60, 348347), (62, 337110), (68, 307365), (85, 245892), (93, 224740), (102, 204910), (124, 168555), (155, 134844), (170, 122946), (186, 112370), (204, 102455), (255, 81964), (310, 67422), (340, 61473), (372, 56185), (465, 44948), (510, 40982), (527, 39660), (620, 33711), (661, 31620), (930, 22474), (1020, 20491), (1054, 19830), (1322, 15810), (1581, 13220), (1860, 11237), (1983, 10540), (2108, 9915), (2635, 7932), (2644, 7905), (3162, 6610), (3305, 6324), (3966, 5270)]