20280778760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{179}}^1\times {\mathrm{257501}}^1$

素因数の和:257702

約数の個数: 64

約数和(自身を含む): 50058388800

約数和(自身を除く): 29777610040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 179, 220, 358, 440, 716, 895, 1432, 1790, 1969, 3580, 3938, 7160, 7876, 9845, 15752, 19690, 39380, 78760, 257501, 515002, 1030004, 1287505, 2060008, 2575010, 2832511, 5150020, 5665022, 10300040, 11330044, 14162555, 22660088, 28325110, 46092679, 56650220, 92185358, 113300440, 184370716, 230463395, 368741432, 460926790, 507019469, 921853580, 1014038938, 1843707160, 2028077876, 2535097345, 4056155752, 5070194690, 10140389380, 20280778760]

約数ペア:

[(1, 20280778760), (2, 10140389380), (4, 5070194690), (5, 4056155752), (8, 2535097345), (10, 2028077876), (11, 1843707160), (20, 1014038938), (22, 921853580), (40, 507019469), (44, 460926790), (55, 368741432), (88, 230463395), (110, 184370716), (179, 113300440), (220, 92185358), (358, 56650220), (440, 46092679), (716, 28325110), (895, 22660088), (1432, 14162555), (1790, 11330044), (1969, 10300040), (3580, 5665022), (3938, 5150020), (7160, 2832511), (7876, 2575010), (9845, 2060008), (15752, 1287505), (19690, 1030004), (39380, 515002), (78760, 257501)]