28543420

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{20101}}^1$

素因数の和:20181

約数の個数: 24

約数和(自身を含む): 60788448

約数和(自身を除く): 32245028

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 20101, 40202, 80404, 100505, 201010, 402020, 1427171, 2854342, 5708684, 7135855, 14271710, 28543420]

約数ペア:

[(1, 28543420), (2, 14271710), (4, 7135855), (5, 5708684), (10, 2854342), (20, 1427171), (71, 402020), (142, 201010), (284, 100505), (355, 80404), (710, 40202), (1420, 20101)]