64664980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{379}}^1\times {\mathrm{449}}^1$

素因数の和:856

約数の個数: 48

約数和(自身を含む): 143640000

約数和(自身を除く): 78975020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 379, 380, 449, 758, 898, 1516, 1796, 1895, 2245, 3790, 4490, 7201, 7580, 8531, 8980, 14402, 17062, 28804, 34124, 36005, 42655, 72010, 85310, 144020, 170171, 170620, 340342, 680684, 850855, 1701710, 3233249, 3403420, 6466498, 12932996, 16166245, 32332490, 64664980]

約数ペア:

[(1, 64664980), (2, 32332490), (4, 16166245), (5, 12932996), (10, 6466498), (19, 3403420), (20, 3233249), (38, 1701710), (76, 850855), (95, 680684), (190, 340342), (379, 170620), (380, 170171), (449, 144020), (758, 85310), (898, 72010), (1516, 42655), (1796, 36005), (1895, 34124), (2245, 28804), (3790, 17062), (4490, 14402), (7201, 8980), (7580, 8531)]