20408820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{23}}^2\times {\mathrm{643}}^1$

素因数の和:701

約数の個数: 72

約数和(自身を含む): 59830176

約数和(自身を除く): 39421356

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 46, 60, 69, 92, 115, 138, 230, 276, 345, 460, 529, 643, 690, 1058, 1286, 1380, 1587, 1929, 2116, 2572, 2645, 3174, 3215, 3858, 5290, 6348, 6430, 7716, 7935, 9645, 10580, 12860, 14789, 15870, 19290, 29578, 31740, 38580, 44367, 59156, 73945, 88734, 147890, 177468, 221835, 295780, 340147, 443670, 680294, 887340, 1020441, 1360588, 1700735, 2040882, 3401470, 4081764, 5102205, 6802940, 10204410, 20408820]

約数ペア:

[(1, 20408820), (2, 10204410), (3, 6802940), (4, 5102205), (5, 4081764), (6, 3401470), (10, 2040882), (12, 1700735), (15, 1360588), (20, 1020441), (23, 887340), (30, 680294), (46, 443670), (60, 340147), (69, 295780), (92, 221835), (115, 177468), (138, 147890), (230, 88734), (276, 73945), (345, 59156), (460, 44367), (529, 38580), (643, 31740), (690, 29578), (1058, 19290), (1286, 15870), (1380, 14789), (1587, 12860), (1929, 10580), (2116, 9645), (2572, 7935), (2645, 7716), (3174, 6430), (3215, 6348), (3858, 5290)]