21142680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13553}}^1$

素因数の和:13580

約数の個数: 64

約数和(自身を含む): 68312160

約数和(自身を除く): 47169480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13553, 27106, 40659, 54212, 67765, 81318, 108424, 135530, 162636, 176189, 203295, 271060, 325272, 352378, 406590, 528567, 542120, 704756, 813180, 880945, 1057134, 1409512, 1626360, 1761890, 2114268, 2642835, 3523780, 4228536, 5285670, 7047560, 10571340, 21142680]

約数ペア:

[(1, 21142680), (2, 10571340), (3, 7047560), (4, 5285670), (5, 4228536), (6, 3523780), (8, 2642835), (10, 2114268), (12, 1761890), (13, 1626360), (15, 1409512), (20, 1057134), (24, 880945), (26, 813180), (30, 704756), (39, 542120), (40, 528567), (52, 406590), (60, 352378), (65, 325272), (78, 271060), (104, 203295), (120, 176189), (130, 162636), (156, 135530), (195, 108424), (260, 81318), (312, 67765), (390, 54212), (520, 40659), (780, 27106), (1560, 13553)]