20678175

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{691}}^1$

素因数の和:733

約数の個数: 72

約数和(自身を含む): 44620160

約数和(自身を除く): 23941985

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 25, 35, 45, 57, 63, 75, 95, 105, 133, 171, 175, 225, 285, 315, 399, 475, 525, 665, 691, 855, 1197, 1425, 1575, 1995, 2073, 3325, 3455, 4275, 4837, 5985, 6219, 9975, 10365, 13129, 14511, 17275, 24185, 29925, 31095, 39387, 43533, 51825, 65645, 72555, 91903, 118161, 120925, 155475, 196935, 217665, 275709, 328225, 362775, 459515, 590805, 827127, 984675, 1088325, 1378545, 2297575, 2954025, 4135635, 6892725, 20678175]

約数ペア:

[(1, 20678175), (3, 6892725), (5, 4135635), (7, 2954025), (9, 2297575), (15, 1378545), (19, 1088325), (21, 984675), (25, 827127), (35, 590805), (45, 459515), (57, 362775), (63, 328225), (75, 275709), (95, 217665), (105, 196935), (133, 155475), (171, 120925), (175, 118161), (225, 91903), (285, 72555), (315, 65645), (399, 51825), (475, 43533), (525, 39387), (665, 31095), (691, 29925), (855, 24185), (1197, 17275), (1425, 14511), (1575, 13129), (1995, 10365), (2073, 9975), (3325, 6219), (3455, 5985), (4275, 4837)]