20354425

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1$

素因数の和:442

約数の個数: 48

約数和(自身を含む): 32497920

約数和(自身を除く): 12143495

約数列:

[1, 5, 7, 13, 23, 25, 35, 65, 91, 115, 161, 175, 299, 325, 389, 455, 575, 805, 1495, 1945, 2093, 2275, 2723, 4025, 5057, 7475, 8947, 9725, 10465, 13615, 25285, 35399, 44735, 52325, 62629, 68075, 116311, 126425, 176995, 223675, 313145, 581555, 814177, 884975, 1565725, 2907775, 4070885, 20354425]

約数ペア:

[(1, 20354425), (5, 4070885), (7, 2907775), (13, 1565725), (23, 884975), (25, 814177), (35, 581555), (65, 313145), (91, 223675), (115, 176995), (161, 126425), (175, 116311), (299, 68075), (325, 62629), (389, 52325), (455, 44735), (575, 35399), (805, 25285), (1495, 13615), (1945, 10465), (2093, 9725), (2275, 8947), (2723, 7475), (4025, 5057)]