128255920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{123323}}^1$

素因数の和:123349

約数の個数: 40

約数和(自身を含む): 321135696

約数和(自身を除く): 192879776

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 123323, 246646, 493292, 616615, 986584, 1233230, 1603199, 1973168, 2466460, 3206398, 4932920, 6412796, 8015995, 9865840, 12825592, 16031990, 25651184, 32063980, 64127960, 128255920]

約数ペア:

[(1, 128255920), (2, 64127960), (4, 32063980), (5, 25651184), (8, 16031990), (10, 12825592), (13, 9865840), (16, 8015995), (20, 6412796), (26, 4932920), (40, 3206398), (52, 2466460), (65, 1973168), (80, 1603199), (104, 1233230), (130, 986584), (208, 616615), (260, 493292), (520, 246646), (1040, 123323)]