21072090

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{761}}^1$

素因数の和:855

約数の個数: 64

約数和(自身を含む): 55302912

約数和(自身を除く): 34230822

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 71, 78, 130, 142, 195, 213, 355, 390, 426, 710, 761, 923, 1065, 1522, 1846, 2130, 2283, 2769, 3805, 4566, 4615, 5538, 7610, 9230, 9893, 11415, 13845, 19786, 22830, 27690, 29679, 49465, 54031, 59358, 98930, 108062, 148395, 162093, 270155, 296790, 324186, 540310, 702403, 810465, 1404806, 1620930, 2107209, 3512015, 4214418, 7024030, 10536045, 21072090]

約数ペア:

[(1, 21072090), (2, 10536045), (3, 7024030), (5, 4214418), (6, 3512015), (10, 2107209), (13, 1620930), (15, 1404806), (26, 810465), (30, 702403), (39, 540310), (65, 324186), (71, 296790), (78, 270155), (130, 162093), (142, 148395), (195, 108062), (213, 98930), (355, 59358), (390, 54031), (426, 49465), (710, 29679), (761, 27690), (923, 22830), (1065, 19786), (1522, 13845), (1846, 11415), (2130, 9893), (2283, 9230), (2769, 7610), (3805, 5538), (4566, 4615)]