21315940

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{311}}^1$

素因数の和:492

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 25858460

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 149, 230, 298, 311, 460, 596, 622, 745, 1244, 1490, 1555, 2980, 3110, 3427, 6220, 6854, 7153, 13708, 14306, 17135, 28612, 34270, 35765, 46339, 68540, 71530, 92678, 143060, 185356, 231695, 463390, 926780, 1065797, 2131594, 4263188, 5328985, 10657970, 21315940]

約数ペア:

[(1, 21315940), (2, 10657970), (4, 5328985), (5, 4263188), (10, 2131594), (20, 1065797), (23, 926780), (46, 463390), (92, 231695), (115, 185356), (149, 143060), (230, 92678), (298, 71530), (311, 68540), (460, 46339), (596, 35765), (622, 34270), (745, 28612), (1244, 17135), (1490, 14306), (1555, 13708), (2980, 7153), (3110, 6854), (3427, 6220)]