21709960

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3457}}^1$

素因数の和:3625

約数の個数: 32

約数和(自身を含む): 49172760

約数和(自身を除く): 27462800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 3457, 6280, 6914, 13828, 17285, 27656, 34570, 69140, 138280, 542749, 1085498, 2170996, 2713745, 4341992, 5427490, 10854980, 21709960]

約数ペア:

[(1, 21709960), (2, 10854980), (4, 5427490), (5, 4341992), (8, 2713745), (10, 2170996), (20, 1085498), (40, 542749), (157, 138280), (314, 69140), (628, 34570), (785, 27656), (1256, 17285), (1570, 13828), (3140, 6914), (3457, 6280)]