20509125

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{601}}^1$

素因数の和:639

約数の個数: 64

約数和(自身を含む): 42072576

約数和(自身を除く): 21563451

約数列:

[1, 3, 5, 7, 13, 15, 21, 25, 35, 39, 65, 75, 91, 105, 125, 175, 195, 273, 325, 375, 455, 525, 601, 875, 975, 1365, 1625, 1803, 2275, 2625, 3005, 4207, 4875, 6825, 7813, 9015, 11375, 12621, 15025, 21035, 23439, 34125, 39065, 45075, 54691, 63105, 75125, 105175, 117195, 164073, 195325, 225375, 273455, 315525, 525875, 585975, 820365, 976625, 1367275, 1577625, 2929875, 4101825, 6836375, 20509125]

約数ペア:

[(1, 20509125), (3, 6836375), (5, 4101825), (7, 2929875), (13, 1577625), (15, 1367275), (21, 976625), (25, 820365), (35, 585975), (39, 525875), (65, 315525), (75, 273455), (91, 225375), (105, 195325), (125, 164073), (175, 117195), (195, 105175), (273, 75125), (325, 63105), (375, 54691), (455, 45075), (525, 39065), (601, 34125), (875, 23439), (975, 21035), (1365, 15025), (1625, 12621), (1803, 11375), (2275, 9015), (2625, 7813), (3005, 6825), (4207, 4875)]