20411505

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{15641}}^1$

素因数の和:15681

約数の個数: 24

約数和(自身を含む): 36602280

約数和(自身を除く): 16190775

約数列:

[1, 3, 5, 9, 15, 29, 45, 87, 145, 261, 435, 1305, 15641, 46923, 78205, 140769, 234615, 453589, 703845, 1360767, 2267945, 4082301, 6803835, 20411505]

約数ペア:

[(1, 20411505), (3, 6803835), (5, 4082301), (9, 2267945), (15, 1360767), (29, 703845), (45, 453589), (87, 234615), (145, 140769), (261, 78205), (435, 46923), (1305, 15641)]