256427220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{610541}}^1$

素因数の和:610560

約数の個数: 48

約数和(自身を含む): 820568448

約数和(自身を除く): 564141228

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, 610541, 1221082, 1831623, 2442164, 3052705, 3663246, 4273787, 6105410, 7326492, 8547574, 9158115, 12210820, 12821361, 17095148, 18316230, 21368935, 25642722, 36632460, 42737870, 51285444, 64106805, 85475740, 128213610, 256427220]

約数ペア:

[(1, 256427220), (2, 128213610), (3, 85475740), (4, 64106805), (5, 51285444), (6, 42737870), (7, 36632460), (10, 25642722), (12, 21368935), (14, 18316230), (15, 17095148), (20, 12821361), (21, 12210820), (28, 9158115), (30, 8547574), (35, 7326492), (42, 6105410), (60, 4273787), (70, 3663246), (84, 3052705), (105, 2442164), (140, 1831623), (210, 1221082), (420, 610541)]