256348540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{12289}}^1$

素因数の和:12454

約数の個数: 48

約数和(自身を含む): 619416000

約数和(自身を除く): 363067460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149, 298, 596, 745, 1043, 1490, 2086, 2980, 4172, 5215, 10430, 12289, 20860, 24578, 49156, 61445, 86023, 122890, 172046, 245780, 344092, 430115, 860230, 1720460, 1831061, 3662122, 7324244, 9155305, 12817427, 18310610, 25634854, 36621220, 51269708, 64087135, 128174270, 256348540]

約数ペア:

[(1, 256348540), (2, 128174270), (4, 64087135), (5, 51269708), (7, 36621220), (10, 25634854), (14, 18310610), (20, 12817427), (28, 9155305), (35, 7324244), (70, 3662122), (140, 1831061), (149, 1720460), (298, 860230), (596, 430115), (745, 344092), (1043, 245780), (1490, 172046), (2086, 122890), (2980, 86023), (4172, 61445), (5215, 49156), (10430, 24578), (12289, 20860)]