21236464

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{317}}^1$

素因数の和:457

約数の個数: 40

約数和(自身を含む): 42586560

約数和(自身を除く): 21350096

約数列:

[1, 2, 4, 8, 16, 53, 79, 106, 158, 212, 316, 317, 424, 632, 634, 848, 1264, 1268, 2536, 4187, 5072, 8374, 16748, 16801, 25043, 33496, 33602, 50086, 66992, 67204, 100172, 134408, 200344, 268816, 400688, 1327279, 2654558, 5309116, 10618232, 21236464]

約数ペア:

[(1, 21236464), (2, 10618232), (4, 5309116), (8, 2654558), (16, 1327279), (53, 400688), (79, 268816), (106, 200344), (158, 134408), (212, 100172), (316, 67204), (317, 66992), (424, 50086), (632, 33602), (634, 33496), (848, 25043), (1264, 16801), (1268, 16748), (2536, 8374), (4187, 5072)]