21525440

素因数分解:

$2^6\times 5^1\times {\mathrm{137}}^1\times {\mathrm{491}}^1$

素因数の和:645

約数の個数: 56

約数和(自身を含む): 51736752

約数和(自身を除く): 30211312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 137, 160, 274, 320, 491, 548, 685, 982, 1096, 1370, 1964, 2192, 2455, 2740, 3928, 4384, 4910, 5480, 7856, 8768, 9820, 10960, 15712, 19640, 21920, 31424, 39280, 43840, 67267, 78560, 134534, 157120, 269068, 336335, 538136, 672670, 1076272, 1345340, 2152544, 2690680, 4305088, 5381360, 10762720, 21525440]

約数ペア:

[(1, 21525440), (2, 10762720), (4, 5381360), (5, 4305088), (8, 2690680), (10, 2152544), (16, 1345340), (20, 1076272), (32, 672670), (40, 538136), (64, 336335), (80, 269068), (137, 157120), (160, 134534), (274, 78560), (320, 67267), (491, 43840), (548, 39280), (685, 31424), (982, 21920), (1096, 19640), (1370, 15712), (1964, 10960), (2192, 9820), (2455, 8768), (2740, 7856), (3928, 5480), (4384, 4910)]