20619940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4933}}^1$

素因数の和:4972

約数の個数: 48

約数和(自身を含む): 49734720

約数和(自身を除く): 29114780

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 4933, 9866, 19732, 24665, 49330, 54263, 93727, 98660, 108526, 187454, 217052, 271315, 374908, 468635, 542630, 937270, 1030997, 1085260, 1874540, 2061994, 4123988, 5154985, 10309970, 20619940]

約数ペア:

[(1, 20619940), (2, 10309970), (4, 5154985), (5, 4123988), (10, 2061994), (11, 1874540), (19, 1085260), (20, 1030997), (22, 937270), (38, 542630), (44, 468635), (55, 374908), (76, 271315), (95, 217052), (110, 187454), (190, 108526), (209, 98660), (220, 93727), (380, 54263), (418, 49330), (836, 24665), (1045, 19732), (2090, 9866), (4180, 4933)]