77721640

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{619}}^1$

素因数の和:746

約数の個数: 64

約数和(自身を含む): 181684800

約数和(自身を除く): 103963160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 73, 86, 146, 172, 215, 292, 344, 365, 430, 584, 619, 730, 860, 1238, 1460, 1720, 2476, 2920, 3095, 3139, 4952, 6190, 6278, 12380, 12556, 15695, 24760, 25112, 26617, 31390, 45187, 53234, 62780, 90374, 106468, 125560, 133085, 180748, 212936, 225935, 266170, 361496, 451870, 532340, 903740, 1064680, 1807480, 1943041, 3886082, 7772164, 9715205, 15544328, 19430410, 38860820, 77721640]

約数ペア:

[(1, 77721640), (2, 38860820), (4, 19430410), (5, 15544328), (8, 9715205), (10, 7772164), (20, 3886082), (40, 1943041), (43, 1807480), (73, 1064680), (86, 903740), (146, 532340), (172, 451870), (215, 361496), (292, 266170), (344, 225935), (365, 212936), (430, 180748), (584, 133085), (619, 125560), (730, 106468), (860, 90374), (1238, 62780), (1460, 53234), (1720, 45187), (2476, 31390), (2920, 26617), (3095, 25112), (3139, 24760), (4952, 15695), (6190, 12556), (6278, 12380)]