256444240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{191}}^1\times {\mathrm{1291}}^1$

素因数の和:1508

約数の個数: 80

約数和(自身を含む): 645958656

約数和(自身を除く): 389514416

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 191, 208, 260, 382, 520, 764, 955, 1040, 1291, 1528, 1910, 2483, 2582, 3056, 3820, 4966, 5164, 6455, 7640, 9932, 10328, 12415, 12910, 15280, 16783, 19864, 20656, 24830, 25820, 33566, 39728, 49660, 51640, 67132, 83915, 99320, 103280, 134264, 167830, 198640, 246581, 268528, 335660, 493162, 671320, 986324, 1232905, 1342640, 1972648, 2465810, 3205553, 3945296, 4931620, 6411106, 9863240, 12822212, 16027765, 19726480, 25644424, 32055530, 51288848, 64111060, 128222120, 256444240]

約数ペア:

[(1, 256444240), (2, 128222120), (4, 64111060), (5, 51288848), (8, 32055530), (10, 25644424), (13, 19726480), (16, 16027765), (20, 12822212), (26, 9863240), (40, 6411106), (52, 4931620), (65, 3945296), (80, 3205553), (104, 2465810), (130, 1972648), (191, 1342640), (208, 1232905), (260, 986324), (382, 671320), (520, 493162), (764, 335660), (955, 268528), (1040, 246581), (1291, 198640), (1528, 167830), (1910, 134264), (2483, 103280), (2582, 99320), (3056, 83915), (3820, 67132), (4966, 51640), (5164, 49660), (6455, 39728), (7640, 33566), (9932, 25820), (10328, 24830), (12415, 20656), (12910, 19864), (15280, 16783)]