21451560

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13751}}^1$

素因数の和:13778

約数の個数: 64

約数和(自身を含む): 69310080

約数和(自身を除く): 47858520

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, 13751, 27502, 41253, 55004, 68755, 82506, 110008, 137510, 165012, 178763, 206265, 275020, 330024, 357526, 412530, 536289, 550040, 715052, 825060, 893815, 1072578, 1430104, 1650120, 1787630, 2145156, 2681445, 3575260, 4290312, 5362890, 7150520, 10725780, 21451560]

約数ペア:

[(1, 21451560), (2, 10725780), (3, 7150520), (4, 5362890), (5, 4290312), (6, 3575260), (8, 2681445), (10, 2145156), (12, 1787630), (13, 1650120), (15, 1430104), (20, 1072578), (24, 893815), (26, 825060), (30, 715052), (39, 550040), (40, 536289), (52, 412530), (60, 357526), (65, 330024), (78, 275020), (104, 206265), (120, 178763), (130, 165012), (156, 137510), (195, 110008), (260, 82506), (312, 68755), (390, 55004), (520, 41253), (780, 27502), (1560, 13751)]