20479940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{347}}^1$

素因数の和:596

約数の個数: 48

約数和(自身を含む): 46654272

約数和(自身を除く): 26174332

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 227, 260, 347, 454, 694, 908, 1135, 1388, 1735, 2270, 2951, 3470, 4511, 4540, 5902, 6940, 9022, 11804, 14755, 18044, 22555, 29510, 45110, 59020, 78769, 90220, 157538, 315076, 393845, 787690, 1023997, 1575380, 2047994, 4095988, 5119985, 10239970, 20479940]

約数ペア:

[(1, 20479940), (2, 10239970), (4, 5119985), (5, 4095988), (10, 2047994), (13, 1575380), (20, 1023997), (26, 787690), (52, 393845), (65, 315076), (130, 157538), (227, 90220), (260, 78769), (347, 59020), (454, 45110), (694, 29510), (908, 22555), (1135, 18044), (1388, 14755), (1735, 11804), (2270, 9022), (2951, 6940), (3470, 5902), (4511, 4540)]