20287605

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{151}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 36049536

約数和(自身を除く): 15761931

約数列:

[1, 3, 5, 13, 15, 39, 53, 65, 151, 159, 169, 195, 265, 453, 507, 689, 755, 795, 845, 1963, 2067, 2265, 2535, 3445, 5889, 8003, 8957, 9815, 10335, 24009, 25519, 26871, 29445, 40015, 44785, 76557, 104039, 120045, 127595, 134355, 312117, 382785, 520195, 1352507, 1560585, 4057521, 6762535, 20287605]

約数ペア:

[(1, 20287605), (3, 6762535), (5, 4057521), (13, 1560585), (15, 1352507), (39, 520195), (53, 382785), (65, 312117), (151, 134355), (159, 127595), (169, 120045), (195, 104039), (265, 76557), (453, 44785), (507, 40015), (689, 29445), (755, 26871), (795, 25519), (845, 24009), (1963, 10335), (2067, 9815), (2265, 8957), (2535, 8003), (3445, 5889)]