81735780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{194609}}^1$

素因数の和:194628

約数の個数: 48

約数和(自身を含む): 261555840

約数和(自身を除く): 179820060

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, 194609, 389218, 583827, 778436, 973045, 1167654, 1362263, 1946090, 2335308, 2724526, 2919135, 3892180, 4086789, 5449052, 5838270, 6811315, 8173578, 11676540, 13622630, 16347156, 20433945, 27245260, 40867890, 81735780]

約数ペア:

[(1, 81735780), (2, 40867890), (3, 27245260), (4, 20433945), (5, 16347156), (6, 13622630), (7, 11676540), (10, 8173578), (12, 6811315), (14, 5838270), (15, 5449052), (20, 4086789), (21, 3892180), (28, 2919135), (30, 2724526), (35, 2335308), (42, 1946090), (60, 1362263), (70, 1167654), (84, 973045), (105, 778436), (140, 583827), (210, 389218), (420, 194609)]