20422480

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{269}}^1$

素因数の和:368

約数の個数: 80

約数和(自身を含む): 52027920

約数和(自身を除く): 31605440

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 73, 80, 104, 130, 146, 208, 260, 269, 292, 365, 520, 538, 584, 730, 949, 1040, 1076, 1168, 1345, 1460, 1898, 2152, 2690, 2920, 3497, 3796, 4304, 4745, 5380, 5840, 6994, 7592, 9490, 10760, 13988, 15184, 17485, 18980, 19637, 21520, 27976, 34970, 37960, 39274, 55952, 69940, 75920, 78548, 98185, 139880, 157096, 196370, 255281, 279760, 314192, 392740, 510562, 785480, 1021124, 1276405, 1570960, 2042248, 2552810, 4084496, 5105620, 10211240, 20422480]

約数ペア:

[(1, 20422480), (2, 10211240), (4, 5105620), (5, 4084496), (8, 2552810), (10, 2042248), (13, 1570960), (16, 1276405), (20, 1021124), (26, 785480), (40, 510562), (52, 392740), (65, 314192), (73, 279760), (80, 255281), (104, 196370), (130, 157096), (146, 139880), (208, 98185), (260, 78548), (269, 75920), (292, 69940), (365, 55952), (520, 39274), (538, 37960), (584, 34970), (730, 27976), (949, 21520), (1040, 19637), (1076, 18980), (1168, 17485), (1345, 15184), (1460, 13988), (1898, 10760), (2152, 9490), (2690, 7592), (2920, 6994), (3497, 5840), (3796, 5380), (4304, 4745)]