31656920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{199}}^1$

素因数の和:348

約数の個数: 64

約数和(自身を含む): 74088000

約数和(自身を除く): 42431080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 97, 164, 194, 199, 205, 328, 388, 398, 410, 485, 776, 796, 820, 970, 995, 1592, 1640, 1940, 1990, 3880, 3977, 3980, 7954, 7960, 8159, 15908, 16318, 19303, 19885, 31816, 32636, 38606, 39770, 40795, 65272, 77212, 79540, 81590, 96515, 154424, 159080, 163180, 193030, 326360, 386060, 772120, 791423, 1582846, 3165692, 3957115, 6331384, 7914230, 15828460, 31656920]

約数ペア:

[(1, 31656920), (2, 15828460), (4, 7914230), (5, 6331384), (8, 3957115), (10, 3165692), (20, 1582846), (40, 791423), (41, 772120), (82, 386060), (97, 326360), (164, 193030), (194, 163180), (199, 159080), (205, 154424), (328, 96515), (388, 81590), (398, 79540), (410, 77212), (485, 65272), (776, 40795), (796, 39770), (820, 38606), (970, 32636), (995, 31816), (1592, 19885), (1640, 19303), (1940, 16318), (1990, 15908), (3880, 8159), (3977, 7960), (3980, 7954)]