21709880

素因数分解:

$2^3\times 5^1\times {\mathrm{542747}}^1$

素因数の和:542758

約数の個数: 16

約数和(自身を含む): 48847320

約数和(自身を除く): 27137440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542747, 1085494, 2170988, 2713735, 4341976, 5427470, 10854940, 21709880]

約数ペア:

[(1, 21709880), (2, 10854940), (4, 5427470), (5, 4341976), (8, 2713735), (10, 2170988), (20, 1085494), (40, 542747)]