81553180

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{191}}^1\times {\mathrm{577}}^1$

素因数の和:814

約数の個数: 48

約数和(自身を含む): 177117696

約数和(自身を除く): 95564516

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 191, 370, 382, 577, 740, 764, 955, 1154, 1910, 2308, 2885, 3820, 5770, 7067, 11540, 14134, 21349, 28268, 35335, 42698, 70670, 85396, 106745, 110207, 141340, 213490, 220414, 426980, 440828, 551035, 1102070, 2204140, 4077659, 8155318, 16310636, 20388295, 40776590, 81553180]

約数ペア:

[(1, 81553180), (2, 40776590), (4, 20388295), (5, 16310636), (10, 8155318), (20, 4077659), (37, 2204140), (74, 1102070), (148, 551035), (185, 440828), (191, 426980), (370, 220414), (382, 213490), (577, 141340), (740, 110207), (764, 106745), (955, 85396), (1154, 70670), (1910, 42698), (2308, 35335), (2885, 28268), (3820, 21349), (5770, 14134), (7067, 11540)]