21155312

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{317}}^1$

素因数の和:465

約数の個数: 40

約数和(自身を含む): 42507696

約数和(自身を除く): 21352384

約数列:

[1, 2, 4, 8, 16, 43, 86, 97, 172, 194, 317, 344, 388, 634, 688, 776, 1268, 1552, 2536, 4171, 5072, 8342, 13631, 16684, 27262, 30749, 33368, 54524, 61498, 66736, 109048, 122996, 218096, 245992, 491984, 1322207, 2644414, 5288828, 10577656, 21155312]

約数ペア:

[(1, 21155312), (2, 10577656), (4, 5288828), (8, 2644414), (16, 1322207), (43, 491984), (86, 245992), (97, 218096), (172, 122996), (194, 109048), (317, 66736), (344, 61498), (388, 54524), (634, 33368), (688, 30749), (776, 27262), (1268, 16684), (1552, 13631), (2536, 8342), (4171, 5072)]