21889660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{84191}}^1$

素因数の和:84213

約数の個数: 24

約数和(自身を含む): 49504896

約数和(自身を除く): 27615236

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 84191, 168382, 336764, 420955, 841910, 1094483, 1683820, 2188966, 4377932, 5472415, 10944830, 21889660]

約数ペア:

[(1, 21889660), (2, 10944830), (4, 5472415), (5, 4377932), (10, 2188966), (13, 1683820), (20, 1094483), (26, 841910), (52, 420955), (65, 336764), (130, 168382), (260, 84191)]