256574120

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:327

約数の個数: 128

約数和(自身を含む): 656916480

約数和(自身を除く): 400342360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 71, 86, 88, 110, 142, 172, 191, 215, 220, 284, 344, 355, 382, 430, 440, 473, 568, 710, 764, 781, 860, 946, 955, 1420, 1528, 1562, 1720, 1892, 1910, 2101, 2365, 2840, 3053, 3124, 3784, 3820, 3905, 4202, 4730, 6106, 6248, 7640, 7810, 8213, 8404, 9460, 10505, 12212, 13561, 15265, 15620, 16426, 16808, 18920, 21010, 24424, 27122, 30530, 31240, 32852, 33583, 41065, 42020, 54244, 61060, 65704, 67166, 67805, 82130, 84040, 90343, 108488, 122120, 134332, 135610, 149171, 164260, 167915, 180686, 268664, 271220, 298342, 328520, 335830, 361372, 451715, 542440, 583123, 596684, 671660, 722744, 745855, 903430, 1166246, 1193368, 1343320, 1491710, 1806860, 2332492, 2915615, 2983420, 3613720, 4664984, 5831230, 5966840, 6414353, 11662460, 12828706, 23324920, 25657412, 32071765, 51314824, 64143530, 128287060, 256574120]

約数ペア:

[(1, 256574120), (2, 128287060), (4, 64143530), (5, 51314824), (8, 32071765), (10, 25657412), (11, 23324920), (20, 12828706), (22, 11662460), (40, 6414353), (43, 5966840), (44, 5831230), (55, 4664984), (71, 3613720), (86, 2983420), (88, 2915615), (110, 2332492), (142, 1806860), (172, 1491710), (191, 1343320), (215, 1193368), (220, 1166246), (284, 903430), (344, 745855), (355, 722744), (382, 671660), (430, 596684), (440, 583123), (473, 542440), (568, 451715), (710, 361372), (764, 335830), (781, 328520), (860, 298342), (946, 271220), (955, 268664), (1420, 180686), (1528, 167915), (1562, 164260), (1720, 149171), (1892, 135610), (1910, 134332), (2101, 122120), (2365, 108488), (2840, 90343), (3053, 84040), (3124, 82130), (3784, 67805), (3820, 67166), (3905, 65704), (4202, 61060), (4730, 54244), (6106, 42020), (6248, 41065), (7640, 33583), (7810, 32852), (8213, 31240), (8404, 30530), (9460, 27122), (10505, 24424), (12212, 21010), (13561, 18920), (15265, 16808), (15620, 16426)]