81507170

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1\times {\mathrm{911}}^1$

素因数の和:1330

約数の個数: 32

約数和(自身を含む): 153653760

約数和(自身を除く): 72146590

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 389, 778, 911, 1822, 1945, 3890, 4555, 8947, 9110, 17894, 20953, 41906, 44735, 89470, 104765, 209530, 354379, 708758, 1771895, 3543790, 8150717, 16301434, 40753585, 81507170]

約数ペア:

[(1, 81507170), (2, 40753585), (5, 16301434), (10, 8150717), (23, 3543790), (46, 1771895), (115, 708758), (230, 354379), (389, 209530), (778, 104765), (911, 89470), (1822, 44735), (1945, 41906), (3890, 20953), (4555, 17894), (8947, 9110)]