21299320

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10867}}^1$

素因数の和:10892

約数の個数: 48

約数和(自身を含む): 55752840

約数和(自身を除く): 34453520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10867, 21734, 43468, 54335, 76069, 86936, 108670, 152138, 217340, 304276, 380345, 434680, 532483, 608552, 760690, 1064966, 1521380, 2129932, 2662415, 3042760, 4259864, 5324830, 10649660, 21299320]

約数ペア:

[(1, 21299320), (2, 10649660), (4, 5324830), (5, 4259864), (7, 3042760), (8, 2662415), (10, 2129932), (14, 1521380), (20, 1064966), (28, 760690), (35, 608552), (40, 532483), (49, 434680), (56, 380345), (70, 304276), (98, 217340), (140, 152138), (196, 108670), (245, 86936), (280, 76069), (392, 54335), (490, 43468), (980, 21734), (1960, 10867)]