20688928

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1213}}^1$

素因数の和:1277

約数の個数: 48

約数和(自身を含む): 44971416

約数和(自身を除く): 24282488

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 41, 52, 82, 104, 164, 208, 328, 416, 533, 656, 1066, 1213, 1312, 2132, 2426, 4264, 4852, 8528, 9704, 15769, 17056, 19408, 31538, 38816, 49733, 63076, 99466, 126152, 198932, 252304, 397864, 504608, 646529, 795728, 1293058, 1591456, 2586116, 5172232, 10344464, 20688928]

約数ペア:

[(1, 20688928), (2, 10344464), (4, 5172232), (8, 2586116), (13, 1591456), (16, 1293058), (26, 795728), (32, 646529), (41, 504608), (52, 397864), (82, 252304), (104, 198932), (164, 126152), (208, 99466), (328, 63076), (416, 49733), (533, 38816), (656, 31538), (1066, 19408), (1213, 17056), (1312, 15769), (2132, 9704), (2426, 8528), (4264, 4852)]