81315740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{4153}}^1$

素因数の和:4262

約数の個数: 48

約数和(自身を含む): 188425440

約数和(自身を除く): 107109700

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 890, 979, 1780, 1958, 3916, 4153, 4895, 8306, 9790, 16612, 19580, 20765, 41530, 45683, 83060, 91366, 182732, 228415, 369617, 456830, 739234, 913660, 1478468, 1848085, 3696170, 4065787, 7392340, 8131574, 16263148, 20328935, 40657870, 81315740]

約数ペア:

[(1, 81315740), (2, 40657870), (4, 20328935), (5, 16263148), (10, 8131574), (11, 7392340), (20, 4065787), (22, 3696170), (44, 1848085), (55, 1478468), (89, 913660), (110, 739234), (178, 456830), (220, 369617), (356, 228415), (445, 182732), (890, 91366), (979, 83060), (1780, 45683), (1958, 41530), (3916, 20765), (4153, 19580), (4895, 16612), (8306, 9790)]