21065824

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{641}}^1$

素因数の和:743

約数の個数: 48

約数和(自身を含む): 45299520

約数和(自身を除く): 24233696

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 79, 104, 158, 208, 316, 416, 632, 641, 1027, 1264, 1282, 2054, 2528, 2564, 4108, 5128, 8216, 8333, 10256, 16432, 16666, 20512, 32864, 33332, 50639, 66664, 101278, 133328, 202556, 266656, 405112, 658307, 810224, 1316614, 1620448, 2633228, 5266456, 10532912, 21065824]

約数ペア:

[(1, 21065824), (2, 10532912), (4, 5266456), (8, 2633228), (13, 1620448), (16, 1316614), (26, 810224), (32, 658307), (52, 405112), (79, 266656), (104, 202556), (158, 133328), (208, 101278), (316, 66664), (416, 50639), (632, 33332), (641, 32864), (1027, 20512), (1264, 16666), (1282, 16432), (2054, 10256), (2528, 8333), (2564, 8216), (4108, 5128)]