21780910

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{4133}}^1$

素因数の和:4188

約数の個数: 32

約数和(自身を含む): 42861312

約数和(自身を除く): 21080402

約数列:

[1, 2, 5, 10, 17, 31, 34, 62, 85, 155, 170, 310, 527, 1054, 2635, 4133, 5270, 8266, 20665, 41330, 70261, 128123, 140522, 256246, 351305, 640615, 702610, 1281230, 2178091, 4356182, 10890455, 21780910]

約数ペア:

[(1, 21780910), (2, 10890455), (5, 4356182), (10, 2178091), (17, 1281230), (31, 702610), (34, 640615), (62, 351305), (85, 256246), (155, 140522), (170, 128123), (310, 70261), (527, 41330), (1054, 20665), (2635, 8266), (4133, 5270)]