20855100

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{9931}}^1$

素因数の和:9955

約数の個数: 72

約数和(自身を含む): 68967808

約数和(自身を除く): 48112708

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 42, 50, 60, 70, 75, 84, 100, 105, 140, 150, 175, 210, 300, 350, 420, 525, 700, 1050, 2100, 9931, 19862, 29793, 39724, 49655, 59586, 69517, 99310, 119172, 139034, 148965, 198620, 208551, 248275, 278068, 297930, 347585, 417102, 496550, 595860, 695170, 744825, 834204, 993100, 1042755, 1390340, 1489650, 1737925, 2085510, 2979300, 3475850, 4171020, 5213775, 6951700, 10427550, 20855100]

約数ペア:

[(1, 20855100), (2, 10427550), (3, 6951700), (4, 5213775), (5, 4171020), (6, 3475850), (7, 2979300), (10, 2085510), (12, 1737925), (14, 1489650), (15, 1390340), (20, 1042755), (21, 993100), (25, 834204), (28, 744825), (30, 695170), (35, 595860), (42, 496550), (50, 417102), (60, 347585), (70, 297930), (75, 278068), (84, 248275), (100, 208551), (105, 198620), (140, 148965), (150, 139034), (175, 119172), (210, 99310), (300, 69517), (350, 59586), (420, 49655), (525, 39724), (700, 29793), (1050, 19862), (2100, 9931)]