78821860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{1049}}^1$

素因数の和:1105

約数の個数: 72

約数和(自身を含む): 189541800

約数和(自身を除く): 110719940

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, 1049, 1105, 1156, 1445, 2098, 2210, 2890, 3757, 4196, 4420, 5245, 5780, 7514, 10490, 13637, 15028, 17833, 18785, 20980, 27274, 35666, 37570, 54548, 68185, 71332, 75140, 89165, 136370, 178330, 231829, 272740, 303161, 356660, 463658, 606322, 927316, 1159145, 1212644, 1515805, 2318290, 3031610, 3941093, 4636580, 6063220, 7882186, 15764372, 19705465, 39410930, 78821860]

約数ペア:

[(1, 78821860), (2, 39410930), (4, 19705465), (5, 15764372), (10, 7882186), (13, 6063220), (17, 4636580), (20, 3941093), (26, 3031610), (34, 2318290), (52, 1515805), (65, 1212644), (68, 1159145), (85, 927316), (130, 606322), (170, 463658), (221, 356660), (260, 303161), (289, 272740), (340, 231829), (442, 178330), (578, 136370), (884, 89165), (1049, 75140), (1105, 71332), (1156, 68185), (1445, 54548), (2098, 37570), (2210, 35666), (2890, 27274), (3757, 20980), (4196, 18785), (4420, 17833), (5245, 15028), (5780, 13637), (7514, 10490)]