21445620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51061}}^1$

素因数の和:51080

約数の個数: 48

約数和(自身を含む): 68627328

約数和(自身を除く): 47181708

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, 51061, 102122, 153183, 204244, 255305, 306366, 357427, 510610, 612732, 714854, 765915, 1021220, 1072281, 1429708, 1531830, 1787135, 2144562, 3063660, 3574270, 4289124, 5361405, 7148540, 10722810, 21445620]

約数ペア:

[(1, 21445620), (2, 10722810), (3, 7148540), (4, 5361405), (5, 4289124), (6, 3574270), (7, 3063660), (10, 2144562), (12, 1787135), (14, 1531830), (15, 1429708), (20, 1072281), (21, 1021220), (28, 765915), (30, 714854), (35, 612732), (42, 510610), (60, 357427), (70, 306366), (84, 255305), (105, 204244), (140, 153183), (210, 102122), (420, 51061)]