81977740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{1091}}^1$

素因数の和:1147

約数の個数: 72

約数和(自身を含む): 197123472

約数和(自身を除く): 115145732

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 289, 340, 442, 578, 884, 1091, 1105, 1156, 1445, 2182, 2210, 2890, 3757, 4364, 4420, 5455, 5780, 7514, 10910, 14183, 15028, 18547, 18785, 21820, 28366, 37094, 37570, 56732, 70915, 74188, 75140, 92735, 141830, 185470, 241111, 283660, 315299, 370940, 482222, 630598, 964444, 1205555, 1261196, 1576495, 2411110, 3152990, 4098887, 4822220, 6305980, 8197774, 16395548, 20494435, 40988870, 81977740]

約数ペア:

[(1, 81977740), (2, 40988870), (4, 20494435), (5, 16395548), (10, 8197774), (13, 6305980), (17, 4822220), (20, 4098887), (26, 3152990), (34, 2411110), (52, 1576495), (65, 1261196), (68, 1205555), (85, 964444), (130, 630598), (170, 482222), (221, 370940), (260, 315299), (289, 283660), (340, 241111), (442, 185470), (578, 141830), (884, 92735), (1091, 75140), (1105, 74188), (1156, 70915), (1445, 56732), (2182, 37570), (2210, 37094), (2890, 28366), (3757, 21820), (4364, 18785), (4420, 18547), (5455, 15028), (5780, 14183), (7514, 10910)]