21280960

素因数分解:

$2^6\times 5^1\times {\mathrm{73}}^1\times {\mathrm{911}}^1$

素因数の和:1001

約数の個数: 56

約数和(自身を含む): 51425856

約数和(自身を除く): 30144896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 73, 80, 146, 160, 292, 320, 365, 584, 730, 911, 1168, 1460, 1822, 2336, 2920, 3644, 4555, 4672, 5840, 7288, 9110, 11680, 14576, 18220, 23360, 29152, 36440, 58304, 66503, 72880, 133006, 145760, 266012, 291520, 332515, 532024, 665030, 1064048, 1330060, 2128096, 2660120, 4256192, 5320240, 10640480, 21280960]

約数ペア:

[(1, 21280960), (2, 10640480), (4, 5320240), (5, 4256192), (8, 2660120), (10, 2128096), (16, 1330060), (20, 1064048), (32, 665030), (40, 532024), (64, 332515), (73, 291520), (80, 266012), (146, 145760), (160, 133006), (292, 72880), (320, 66503), (365, 58304), (584, 36440), (730, 29152), (911, 23360), (1168, 18220), (1460, 14576), (1822, 11680), (2336, 9110), (2920, 7288), (3644, 5840), (4555, 4672)]