220197980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{155069}}^1$

素因数の和:155149

約数の個数: 24

約数和(自身を含む): 468931680

約数和(自身を除く): 248733700

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 155069, 310138, 620276, 775345, 1550690, 3101380, 11009899, 22019798, 44039596, 55049495, 110098990, 220197980]

約数ペア:

[(1, 220197980), (2, 110098990), (4, 55049495), (5, 44039596), (10, 22019798), (20, 11009899), (71, 3101380), (142, 1550690), (284, 775345), (355, 620276), (710, 310138), (1420, 155069)]