21099820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{5197}}^1$

素因数の和:5242

約数の個数: 48

約数和(自身を含む): 52395840

約数和(自身を除く): 31296020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 5197, 10394, 20788, 25985, 36379, 51970, 72758, 103940, 145516, 150713, 181895, 301426, 363790, 602852, 727580, 753565, 1054991, 1507130, 2109982, 3014260, 4219964, 5274955, 10549910, 21099820]

約数ペア:

[(1, 21099820), (2, 10549910), (4, 5274955), (5, 4219964), (7, 3014260), (10, 2109982), (14, 1507130), (20, 1054991), (28, 753565), (29, 727580), (35, 602852), (58, 363790), (70, 301426), (116, 181895), (140, 150713), (145, 145516), (203, 103940), (290, 72758), (406, 51970), (580, 36379), (812, 25985), (1015, 20788), (2030, 10394), (4060, 5197)]