21396780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4099}}^1$

素因数の和:4143

約数の個数: 72

約数和(自身を含む): 67158000

約数和(自身を除く): 45761220

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 145, 174, 180, 261, 290, 348, 435, 522, 580, 870, 1044, 1305, 1740, 2610, 4099, 5220, 8198, 12297, 16396, 20495, 24594, 36891, 40990, 49188, 61485, 73782, 81980, 118871, 122970, 147564, 184455, 237742, 245940, 356613, 368910, 475484, 594355, 713226, 737820, 1069839, 1188710, 1426452, 1783065, 2139678, 2377420, 3566130, 4279356, 5349195, 7132260, 10698390, 21396780]

約数ペア:

[(1, 21396780), (2, 10698390), (3, 7132260), (4, 5349195), (5, 4279356), (6, 3566130), (9, 2377420), (10, 2139678), (12, 1783065), (15, 1426452), (18, 1188710), (20, 1069839), (29, 737820), (30, 713226), (36, 594355), (45, 475484), (58, 368910), (60, 356613), (87, 245940), (90, 237742), (116, 184455), (145, 147564), (174, 122970), (180, 118871), (261, 81980), (290, 73782), (348, 61485), (435, 49188), (522, 40990), (580, 36891), (870, 24594), (1044, 20495), (1305, 16396), (1740, 12297), (2610, 8198), (4099, 5220)]