81507580

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{7561}}^1$

素因数の和:7595

約数の個数: 72

約数和(自身を含む): 217241136

約数和(自身を除く): 135733556

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 140, 154, 196, 220, 245, 308, 385, 490, 539, 770, 980, 1078, 1540, 2156, 2695, 5390, 7561, 10780, 15122, 30244, 37805, 52927, 75610, 83171, 105854, 151220, 166342, 211708, 264635, 332684, 370489, 415855, 529270, 582197, 740978, 831710, 1058540, 1164394, 1481956, 1663420, 1852445, 2328788, 2910985, 3704890, 4075379, 5821970, 7409780, 8150758, 11643940, 16301516, 20376895, 40753790, 81507580]

約数ペア:

[(1, 81507580), (2, 40753790), (4, 20376895), (5, 16301516), (7, 11643940), (10, 8150758), (11, 7409780), (14, 5821970), (20, 4075379), (22, 3704890), (28, 2910985), (35, 2328788), (44, 1852445), (49, 1663420), (55, 1481956), (70, 1164394), (77, 1058540), (98, 831710), (110, 740978), (140, 582197), (154, 529270), (196, 415855), (220, 370489), (245, 332684), (308, 264635), (385, 211708), (490, 166342), (539, 151220), (770, 105854), (980, 83171), (1078, 75610), (1540, 52927), (2156, 37805), (2695, 30244), (5390, 15122), (7561, 10780)]