20679225

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{331}}^1$

素因数の和:375

約数の個数: 72

約数和(自身を含む): 42238368

約数和(自身を除く): 21559143

約数列:

[1, 3, 5, 7, 15, 17, 21, 25, 35, 49, 51, 75, 85, 105, 119, 147, 175, 245, 255, 331, 357, 425, 525, 595, 735, 833, 993, 1225, 1275, 1655, 1785, 2317, 2499, 2975, 3675, 4165, 4965, 5627, 6951, 8275, 8925, 11585, 12495, 16219, 16881, 20825, 24825, 28135, 34755, 39389, 48657, 57925, 62475, 81095, 84405, 118167, 140675, 173775, 196945, 243285, 275723, 405475, 422025, 590835, 827169, 984725, 1216425, 1378615, 2954175, 4135845, 6893075, 20679225]

約数ペア:

[(1, 20679225), (3, 6893075), (5, 4135845), (7, 2954175), (15, 1378615), (17, 1216425), (21, 984725), (25, 827169), (35, 590835), (49, 422025), (51, 405475), (75, 275723), (85, 243285), (105, 196945), (119, 173775), (147, 140675), (175, 118167), (245, 84405), (255, 81095), (331, 62475), (357, 57925), (425, 48657), (525, 39389), (595, 34755), (735, 28135), (833, 24825), (993, 20825), (1225, 16881), (1275, 16219), (1655, 12495), (1785, 11585), (2317, 8925), (2499, 8275), (2975, 6951), (3675, 5627), (4165, 4965)]