398778920

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{151}}^1\times {\mathrm{641}}^1$

素因数の和:906

約数の個数: 64

約数和(自身を含む): 913386240

約数和(自身を除く): 514607320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 151, 206, 302, 412, 515, 604, 641, 755, 824, 1030, 1208, 1282, 1510, 2060, 2564, 3020, 3205, 4120, 5128, 6040, 6410, 12820, 15553, 25640, 31106, 62212, 66023, 77765, 96791, 124424, 132046, 155530, 193582, 264092, 311060, 330115, 387164, 483955, 528184, 622120, 660230, 774328, 967910, 1320460, 1935820, 2640920, 3871640, 9969473, 19938946, 39877892, 49847365, 79755784, 99694730, 199389460, 398778920]

約数ペア:

[(1, 398778920), (2, 199389460), (4, 99694730), (5, 79755784), (8, 49847365), (10, 39877892), (20, 19938946), (40, 9969473), (103, 3871640), (151, 2640920), (206, 1935820), (302, 1320460), (412, 967910), (515, 774328), (604, 660230), (641, 622120), (755, 528184), (824, 483955), (1030, 387164), (1208, 330115), (1282, 311060), (1510, 264092), (2060, 193582), (2564, 155530), (3020, 132046), (3205, 124424), (4120, 96791), (5128, 77765), (6040, 66023), (6410, 62212), (12820, 31106), (15553, 25640)]