20443725

素因数分解:

$3^3\times 5^2\times {\mathrm{31}}^1\times {\mathrm{977}}^1$

素因数の和:1027

約数の個数: 48

約数和(自身を含む): 38807040

約数和(自身を除く): 18363315

約数列:

[1, 3, 5, 9, 15, 25, 27, 31, 45, 75, 93, 135, 155, 225, 279, 465, 675, 775, 837, 977, 1395, 2325, 2931, 4185, 4885, 6975, 8793, 14655, 20925, 24425, 26379, 30287, 43965, 73275, 90861, 131895, 151435, 219825, 272583, 454305, 659475, 757175, 817749, 1362915, 2271525, 4088745, 6814575, 20443725]

約数ペア:

[(1, 20443725), (3, 6814575), (5, 4088745), (9, 2271525), (15, 1362915), (25, 817749), (27, 757175), (31, 659475), (45, 454305), (75, 272583), (93, 219825), (135, 151435), (155, 131895), (225, 90861), (279, 73275), (465, 43965), (675, 30287), (775, 26379), (837, 24425), (977, 20925), (1395, 14655), (2325, 8793), (2931, 6975), (4185, 4885)]