21000895480

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1787}}^1\times {\mathrm{3719}}^1$

素因数の和:5596

約数の個数: 64

約数和(自身を含む): 47889792000

約数和(自身を除く): 26888896520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 1787, 3160, 3574, 3719, 7148, 7438, 8935, 14296, 14876, 17870, 18595, 29752, 35740, 37190, 71480, 74380, 141173, 148760, 282346, 293801, 564692, 587602, 705865, 1129384, 1175204, 1411730, 1469005, 2350408, 2823460, 2938010, 5646920, 5876020, 6645853, 11752040, 13291706, 26583412, 33229265, 53166824, 66458530, 132917060, 265834120, 525022387, 1050044774, 2100089548, 2625111935, 4200179096, 5250223870, 10500447740, 21000895480]

約数ペア:

[(1, 21000895480), (2, 10500447740), (4, 5250223870), (5, 4200179096), (8, 2625111935), (10, 2100089548), (20, 1050044774), (40, 525022387), (79, 265834120), (158, 132917060), (316, 66458530), (395, 53166824), (632, 33229265), (790, 26583412), (1580, 13291706), (1787, 11752040), (3160, 6645853), (3574, 5876020), (3719, 5646920), (7148, 2938010), (7438, 2823460), (8935, 2350408), (14296, 1469005), (14876, 1411730), (17870, 1175204), (18595, 1129384), (29752, 705865), (35740, 587602), (37190, 564692), (71480, 293801), (74380, 282346), (141173, 148760)]