21315970

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12613}}^1$

素因数の和:12646

約数の個数: 24

約数和(自身を含む): 41550516

約数和(自身を除く): 20234546

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12613, 25226, 63065, 126130, 163969, 327938, 819845, 1639690, 2131597, 4263194, 10657985, 21315970]

約数ペア:

[(1, 21315970), (2, 10657985), (5, 4263194), (10, 2131597), (13, 1639690), (26, 819845), (65, 327938), (130, 163969), (169, 126130), (338, 63065), (845, 25226), (1690, 12613)]