18935540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1087}}^1$

素因数の和:1176

約数の個数: 48

約数和(自身を含む): 43502592

約数和(自身を除く): 24567052

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 67, 130, 134, 260, 268, 335, 670, 871, 1087, 1340, 1742, 2174, 3484, 4348, 4355, 5435, 8710, 10870, 14131, 17420, 21740, 28262, 56524, 70655, 72829, 141310, 145658, 282620, 291316, 364145, 728290, 946777, 1456580, 1893554, 3787108, 4733885, 9467770, 18935540]

約数ペア:

[(1, 18935540), (2, 9467770), (4, 4733885), (5, 3787108), (10, 1893554), (13, 1456580), (20, 946777), (26, 728290), (52, 364145), (65, 291316), (67, 282620), (130, 145658), (134, 141310), (260, 72829), (268, 70655), (335, 56524), (670, 28262), (871, 21740), (1087, 17420), (1340, 14131), (1742, 10870), (2174, 8710), (3484, 5435), (4348, 4355)]