21636860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{4177}}^1$

素因数の和:4230

約数の個数: 48

約数和(自身を含む): 53344704

約数和(自身を除く): 31707844

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 4177, 5180, 8354, 16708, 20885, 29239, 41770, 58478, 83540, 116956, 146195, 154549, 292390, 309098, 584780, 618196, 772745, 1081843, 1545490, 2163686, 3090980, 4327372, 5409215, 10818430, 21636860]

約数ペア:

[(1, 21636860), (2, 10818430), (4, 5409215), (5, 4327372), (7, 3090980), (10, 2163686), (14, 1545490), (20, 1081843), (28, 772745), (35, 618196), (37, 584780), (70, 309098), (74, 292390), (140, 154549), (148, 146195), (185, 116956), (259, 83540), (370, 58478), (518, 41770), (740, 29239), (1036, 20885), (1295, 16708), (2590, 8354), (4177, 5180)]