256421556

素因数分解:

$2^2\times 3^2\times {\mathrm{43}}^1\times {\mathrm{151}}^1\times {\mathrm{1097}}^1$

素因数の和:1301

約数の個数: 72

約数和(自身を含む): 668251584

約数和(自身を除く): 411830028

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 43, 86, 129, 151, 172, 258, 302, 387, 453, 516, 604, 774, 906, 1097, 1359, 1548, 1812, 2194, 2718, 3291, 4388, 5436, 6493, 6582, 9873, 12986, 13164, 19479, 19746, 25972, 38958, 39492, 47171, 58437, 77916, 94342, 116874, 141513, 165647, 188684, 233748, 283026, 331294, 424539, 496941, 566052, 662588, 849078, 993882, 1490823, 1698156, 1987764, 2981646, 5963292, 7122821, 14245642, 21368463, 28491284, 42736926, 64105389, 85473852, 128210778, 256421556]

約数ペア:

[(1, 256421556), (2, 128210778), (3, 85473852), (4, 64105389), (6, 42736926), (9, 28491284), (12, 21368463), (18, 14245642), (36, 7122821), (43, 5963292), (86, 2981646), (129, 1987764), (151, 1698156), (172, 1490823), (258, 993882), (302, 849078), (387, 662588), (453, 566052), (516, 496941), (604, 424539), (774, 331294), (906, 283026), (1097, 233748), (1359, 188684), (1548, 165647), (1812, 141513), (2194, 116874), (2718, 94342), (3291, 77916), (4388, 58437), (5436, 47171), (6493, 39492), (6582, 38958), (9873, 25972), (12986, 19746), (13164, 19479)]