81768540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{194687}}^1$

素因数の和:194706

約数の個数: 48

約数和(自身を含む): 261660672

約数和(自身を除く): 179892132

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, 194687, 389374, 584061, 778748, 973435, 1168122, 1362809, 1946870, 2336244, 2725618, 2920305, 3893740, 4088427, 5451236, 5840610, 6814045, 8176854, 11681220, 13628090, 16353708, 20442135, 27256180, 40884270, 81768540]

約数ペア:

[(1, 81768540), (2, 40884270), (3, 27256180), (4, 20442135), (5, 16353708), (6, 13628090), (7, 11681220), (10, 8176854), (12, 6814045), (14, 5840610), (15, 5451236), (20, 4088427), (21, 3893740), (28, 2920305), (30, 2725618), (35, 2336244), (42, 1946870), (60, 1362809), (70, 1168122), (84, 973435), (105, 778748), (140, 584061), (210, 389374), (420, 194687)]