20342920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:143

約数の個数: 128

約数和(自身を含む): 54432000

約数和(自身を除く): 34089080

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 29, 38, 40, 52, 58, 65, 71, 76, 95, 104, 116, 130, 142, 145, 152, 190, 232, 247, 260, 284, 290, 355, 377, 380, 494, 520, 551, 568, 580, 710, 754, 760, 923, 988, 1102, 1160, 1235, 1349, 1420, 1508, 1846, 1885, 1976, 2059, 2204, 2470, 2698, 2755, 2840, 3016, 3692, 3770, 4118, 4408, 4615, 4940, 5396, 5510, 6745, 7163, 7384, 7540, 8236, 9230, 9880, 10295, 10792, 11020, 13490, 14326, 15080, 16472, 17537, 18460, 20590, 22040, 26767, 26980, 28652, 35074, 35815, 36920, 39121, 41180, 53534, 53960, 57304, 70148, 71630, 78242, 82360, 87685, 107068, 133835, 140296, 143260, 156484, 175370, 195605, 214136, 267670, 286520, 312968, 350740, 391210, 508573, 535340, 701480, 782420, 1017146, 1070680, 1564840, 2034292, 2542865, 4068584, 5085730, 10171460, 20342920]

約数ペア:

[(1, 20342920), (2, 10171460), (4, 5085730), (5, 4068584), (8, 2542865), (10, 2034292), (13, 1564840), (19, 1070680), (20, 1017146), (26, 782420), (29, 701480), (38, 535340), (40, 508573), (52, 391210), (58, 350740), (65, 312968), (71, 286520), (76, 267670), (95, 214136), (104, 195605), (116, 175370), (130, 156484), (142, 143260), (145, 140296), (152, 133835), (190, 107068), (232, 87685), (247, 82360), (260, 78242), (284, 71630), (290, 70148), (355, 57304), (377, 53960), (380, 53534), (494, 41180), (520, 39121), (551, 36920), (568, 35815), (580, 35074), (710, 28652), (754, 26980), (760, 26767), (923, 22040), (988, 20590), (1102, 18460), (1160, 17537), (1235, 16472), (1349, 15080), (1420, 14326), (1508, 13490), (1846, 11020), (1885, 10792), (1976, 10295), (2059, 9880), (2204, 9230), (2470, 8236), (2698, 7540), (2755, 7384), (2840, 7163), (3016, 6745), (3692, 5510), (3770, 5396), (4118, 4940), (4408, 4615)]