21664020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51581}}^1$

素因数の和:51600

約数の個数: 48

約数和(自身を含む): 69326208

約数和(自身を除く): 47662188

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, 51581, 103162, 154743, 206324, 257905, 309486, 361067, 515810, 618972, 722134, 773715, 1031620, 1083201, 1444268, 1547430, 1805335, 2166402, 3094860, 3610670, 4332804, 5416005, 7221340, 10832010, 21664020]

約数ペア:

[(1, 21664020), (2, 10832010), (3, 7221340), (4, 5416005), (5, 4332804), (6, 3610670), (7, 3094860), (10, 2166402), (12, 1805335), (14, 1547430), (15, 1444268), (20, 1083201), (21, 1031620), (28, 773715), (30, 722134), (35, 618972), (42, 515810), (60, 361067), (70, 309486), (84, 257905), (105, 206324), (140, 154743), (210, 103162), (420, 51581)]