21972340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{84509}}^1$

素因数の和:84531

約数の個数: 24

約数和(自身を含む): 49691880

約数和(自身を除く): 27719540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 84509, 169018, 338036, 422545, 845090, 1098617, 1690180, 2197234, 4394468, 5493085, 10986170, 21972340]

約数ペア:

[(1, 21972340), (2, 10986170), (4, 5493085), (5, 4394468), (10, 2197234), (13, 1690180), (20, 1098617), (26, 845090), (52, 422545), (65, 338036), (130, 169018), (260, 84509)]