20177980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{3491}}^1$

素因数の和:3534

約数の個数: 36

約数和(自身を含む): 45025848

約数和(自身を除く): 24847868

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 289, 340, 578, 1156, 1445, 2890, 3491, 5780, 6982, 13964, 17455, 34910, 59347, 69820, 118694, 237388, 296735, 593470, 1008899, 1186940, 2017798, 4035596, 5044495, 10088990, 20177980]

約数ペア:

[(1, 20177980), (2, 10088990), (4, 5044495), (5, 4035596), (10, 2017798), (17, 1186940), (20, 1008899), (34, 593470), (68, 296735), (85, 237388), (170, 118694), (289, 69820), (340, 59347), (578, 34910), (1156, 17455), (1445, 13964), (2890, 6982), (3491, 5780)]