256606980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{610969}}^1$

素因数の和:610988

約数の個数: 48

約数和(自身を含む): 821143680

約数和(自身を除く): 564536700

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 610969, 1221938, 1832907, 2443876, 3054845, 3665814, 4276783, 6109690, 7331628, 8553566, 9164535, 12219380, 12830349, 17107132, 18329070, 21383915, 25660698, 36658140, 42767830, 51321396, 64151745, 85535660, 128303490, 256606980]

約数ペア:

[(1, 256606980), (2, 128303490), (3, 85535660), (4, 64151745), (5, 51321396), (6, 42767830), (7, 36658140), (10, 25660698), (12, 21383915), (14, 18329070), (15, 17107132), (20, 12830349), (21, 12219380), (28, 9164535), (30, 8553566), (35, 7331628), (42, 6109690), (60, 4276783), (70, 3665814), (84, 3054845), (105, 2443876), (140, 1832907), (210, 1221938), (420, 610969)]