21158620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6571}}^1$

素因数の和:6610

約数の個数: 48

約数和(自身を含む): 52996608

約数和(自身を除く): 31837988

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6571, 13142, 26284, 32855, 45997, 65710, 91994, 131420, 151133, 183988, 229985, 302266, 459970, 604532, 755665, 919940, 1057931, 1511330, 2115862, 3022660, 4231724, 5289655, 10579310, 21158620]

約数ペア:

[(1, 21158620), (2, 10579310), (4, 5289655), (5, 4231724), (7, 3022660), (10, 2115862), (14, 1511330), (20, 1057931), (23, 919940), (28, 755665), (35, 604532), (46, 459970), (70, 302266), (92, 229985), (115, 183988), (140, 151133), (161, 131420), (230, 91994), (322, 65710), (460, 45997), (644, 32855), (805, 26284), (1610, 13142), (3220, 6571)]