20121448240

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{239}}^1\times {\mathrm{22391}}^1$

素因数の和:22690

約数の個数: 80

約数和(自身を含む): 47979786240

約数和(自身を除く): 27858338000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 80, 94, 188, 235, 239, 376, 470, 478, 752, 940, 956, 1195, 1880, 1912, 2390, 3760, 3824, 4780, 9560, 11233, 19120, 22391, 22466, 44782, 44932, 56165, 89564, 89864, 111955, 112330, 179128, 179728, 223910, 224660, 358256, 447820, 449320, 895640, 898640, 1052377, 1791280, 2104754, 4209508, 5261885, 5351449, 8419016, 10523770, 10702898, 16838032, 21047540, 21405796, 26757245, 42095080, 42811592, 53514490, 84190160, 85623184, 107028980, 214057960, 251518103, 428115920, 503036206, 1006072412, 1257590515, 2012144824, 2515181030, 4024289648, 5030362060, 10060724120, 20121448240]

約数ペア:

[(1, 20121448240), (2, 10060724120), (4, 5030362060), (5, 4024289648), (8, 2515181030), (10, 2012144824), (16, 1257590515), (20, 1006072412), (40, 503036206), (47, 428115920), (80, 251518103), (94, 214057960), (188, 107028980), (235, 85623184), (239, 84190160), (376, 53514490), (470, 42811592), (478, 42095080), (752, 26757245), (940, 21405796), (956, 21047540), (1195, 16838032), (1880, 10702898), (1912, 10523770), (2390, 8419016), (3760, 5351449), (3824, 5261885), (4780, 4209508), (9560, 2104754), (11233, 1791280), (19120, 1052377), (22391, 898640), (22466, 895640), (44782, 449320), (44932, 447820), (56165, 358256), (89564, 224660), (89864, 223910), (111955, 179728), (112330, 179128)]