20280

素因数分解:

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

素因数の和:40

約数の個数: 48

約数和(自身を含む): 65880

約数和(自身を除く): 45600

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, 169, 195, 260, 312, 338, 390, 507, 520, 676, 780, 845, 1014, 1352, 1560, 1690, 2028, 2535, 3380, 4056, 5070, 6760, 10140, 20280]

約数ペア:

[(1, 20280), (2, 10140), (3, 6760), (4, 5070), (5, 4056), (6, 3380), (8, 2535), (10, 2028), (12, 1690), (13, 1560), (15, 1352), (20, 1014), (24, 845), (26, 780), (30, 676), (39, 520), (40, 507), (52, 390), (60, 338), (65, 312), (78, 260), (104, 195), (120, 169), (130, 156)]