256620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1$

素因数の和:79

約数の個数: 96

約数和(自身を含む): 903168

約数和(自身を除く): 646548

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 47, 52, 60, 65, 70, 78, 84, 91, 94, 105, 130, 140, 141, 156, 182, 188, 195, 210, 235, 260, 273, 282, 329, 364, 390, 420, 455, 470, 546, 564, 611, 658, 705, 780, 910, 940, 987, 1092, 1222, 1316, 1365, 1410, 1645, 1820, 1833, 1974, 2444, 2730, 2820, 3055, 3290, 3666, 3948, 4277, 4935, 5460, 6110, 6580, 7332, 8554, 9165, 9870, 12220, 12831, 17108, 18330, 19740, 21385, 25662, 36660, 42770, 51324, 64155, 85540, 128310, 256620]

約数ペア:

[(1, 256620), (2, 128310), (3, 85540), (4, 64155), (5, 51324), (6, 42770), (7, 36660), (10, 25662), (12, 21385), (13, 19740), (14, 18330), (15, 17108), (20, 12831), (21, 12220), (26, 9870), (28, 9165), (30, 8554), (35, 7332), (39, 6580), (42, 6110), (47, 5460), (52, 4935), (60, 4277), (65, 3948), (70, 3666), (78, 3290), (84, 3055), (91, 2820), (94, 2730), (105, 2444), (130, 1974), (140, 1833), (141, 1820), (156, 1645), (182, 1410), (188, 1365), (195, 1316), (210, 1222), (235, 1092), (260, 987), (273, 940), (282, 910), (329, 780), (364, 705), (390, 658), (420, 611), (455, 564), (470, 546)]