21425456

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103007}}^1$

素因数の和:103028

約数の個数: 20

約数和(自身を含む): 44705472

約数和(自身を除く): 23280016

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 103007, 206014, 412028, 824056, 1339091, 1648112, 2678182, 5356364, 10712728, 21425456]

約数ペア:

[(1, 21425456), (2, 10712728), (4, 5356364), (8, 2678182), (13, 1648112), (16, 1339091), (26, 824056), (52, 412028), (104, 206014), (208, 103007)]