87311180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{109}}^1\times {\mathrm{331}}^1$

素因数の和:471

約数の個数: 72

約数和(自身を含む): 204000720

約数和(自身を除く): 116689540

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 109, 110, 121, 218, 220, 242, 331, 436, 484, 545, 605, 662, 1090, 1199, 1210, 1324, 1655, 2180, 2398, 2420, 3310, 3641, 4796, 5995, 6620, 7282, 11990, 13189, 14564, 18205, 23980, 26378, 36079, 36410, 40051, 52756, 65945, 72158, 72820, 80102, 131890, 144316, 160204, 180395, 200255, 263780, 360790, 396869, 400510, 721580, 793738, 801020, 1587476, 1984345, 3968690, 4365559, 7937380, 8731118, 17462236, 21827795, 43655590, 87311180]

約数ペア:

[(1, 87311180), (2, 43655590), (4, 21827795), (5, 17462236), (10, 8731118), (11, 7937380), (20, 4365559), (22, 3968690), (44, 1984345), (55, 1587476), (109, 801020), (110, 793738), (121, 721580), (218, 400510), (220, 396869), (242, 360790), (331, 263780), (436, 200255), (484, 180395), (545, 160204), (605, 144316), (662, 131890), (1090, 80102), (1199, 72820), (1210, 72158), (1324, 65945), (1655, 52756), (2180, 40051), (2398, 36410), (2420, 36079), (3310, 26378), (3641, 23980), (4796, 18205), (5995, 14564), (6620, 13189), (7282, 11990)]