61781140

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1\times {\mathrm{397}}^1$

素因数の和:688

約数の個数: 48

約数和(自身を含む): 134797824

約数和(自身を除く): 73016684

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 251, 310, 397, 502, 620, 794, 1004, 1255, 1588, 1985, 2510, 3970, 5020, 7781, 7940, 12307, 15562, 24614, 31124, 38905, 49228, 61535, 77810, 99647, 123070, 155620, 199294, 246140, 398588, 498235, 996470, 1992940, 3089057, 6178114, 12356228, 15445285, 30890570, 61781140]

約数ペア:

[(1, 61781140), (2, 30890570), (4, 15445285), (5, 12356228), (10, 6178114), (20, 3089057), (31, 1992940), (62, 996470), (124, 498235), (155, 398588), (251, 246140), (310, 199294), (397, 155620), (502, 123070), (620, 99647), (794, 77810), (1004, 61535), (1255, 49228), (1588, 38905), (1985, 31124), (2510, 24614), (3970, 15562), (5020, 12307), (7781, 7940)]