21685040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{719}}^1$

素因数の和:774

約数の個数: 80

約数和(自身を含む): 56246400

約数和(自身を除く): 34561360

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 29, 40, 52, 58, 65, 80, 104, 116, 130, 145, 208, 232, 260, 290, 377, 464, 520, 580, 719, 754, 1040, 1160, 1438, 1508, 1885, 2320, 2876, 3016, 3595, 3770, 5752, 6032, 7190, 7540, 9347, 11504, 14380, 15080, 18694, 20851, 28760, 30160, 37388, 41702, 46735, 57520, 74776, 83404, 93470, 104255, 149552, 166808, 186940, 208510, 271063, 333616, 373880, 417020, 542126, 747760, 834040, 1084252, 1355315, 1668080, 2168504, 2710630, 4337008, 5421260, 10842520, 21685040]

約数ペア:

[(1, 21685040), (2, 10842520), (4, 5421260), (5, 4337008), (8, 2710630), (10, 2168504), (13, 1668080), (16, 1355315), (20, 1084252), (26, 834040), (29, 747760), (40, 542126), (52, 417020), (58, 373880), (65, 333616), (80, 271063), (104, 208510), (116, 186940), (130, 166808), (145, 149552), (208, 104255), (232, 93470), (260, 83404), (290, 74776), (377, 57520), (464, 46735), (520, 41702), (580, 37388), (719, 30160), (754, 28760), (1040, 20851), (1160, 18694), (1438, 15080), (1508, 14380), (1885, 11504), (2320, 9347), (2876, 7540), (3016, 7190), (3595, 6032), (3770, 5752)]