21538140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{521}}^1$

素因数の和:599

約数の個数: 96

約数和(自身を含む): 66298176

約数和(自身を除く): 44760036

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 53, 60, 65, 78, 106, 130, 156, 159, 195, 212, 260, 265, 318, 390, 521, 530, 636, 689, 780, 795, 1042, 1060, 1378, 1563, 1590, 2067, 2084, 2605, 2756, 3126, 3180, 3445, 4134, 5210, 6252, 6773, 6890, 7815, 8268, 10335, 10420, 13546, 13780, 15630, 20319, 20670, 27092, 27613, 31260, 33865, 40638, 41340, 55226, 67730, 81276, 82839, 101595, 110452, 135460, 138065, 165678, 203190, 276130, 331356, 358969, 406380, 414195, 552260, 717938, 828390, 1076907, 1435876, 1656780, 1794845, 2153814, 3589690, 4307628, 5384535, 7179380, 10769070, 21538140]

約数ペア:

[(1, 21538140), (2, 10769070), (3, 7179380), (4, 5384535), (5, 4307628), (6, 3589690), (10, 2153814), (12, 1794845), (13, 1656780), (15, 1435876), (20, 1076907), (26, 828390), (30, 717938), (39, 552260), (52, 414195), (53, 406380), (60, 358969), (65, 331356), (78, 276130), (106, 203190), (130, 165678), (156, 138065), (159, 135460), (195, 110452), (212, 101595), (260, 82839), (265, 81276), (318, 67730), (390, 55226), (521, 41340), (530, 40638), (636, 33865), (689, 31260), (780, 27613), (795, 27092), (1042, 20670), (1060, 20319), (1378, 15630), (1563, 13780), (1590, 13546), (2067, 10420), (2084, 10335), (2605, 8268), (2756, 7815), (3126, 6890), (3180, 6773), (3445, 6252), (4134, 5210)]