20128475

素因数分解:

$5^2\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{197}}^1$

素因数の和:335

約数の個数: 24

約数和(自身を含む): 25877808

約数和(自身を除く): 5749333

約数列:

[1, 5, 25, 61, 67, 197, 305, 335, 985, 1525, 1675, 4087, 4925, 12017, 13199, 20435, 60085, 65995, 102175, 300425, 329975, 805139, 4025695, 20128475]

約数ペア:

[(1, 20128475), (5, 4025695), (25, 805139), (61, 329975), (67, 300425), (197, 102175), (305, 65995), (335, 60085), (985, 20435), (1525, 13199), (1675, 12017), (4087, 4925)]