21642420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1831}}^1$

素因数の和:2040

約数の個数: 48

約数和(自身を含む): 60939648

約数和(自身を除く): 39297228

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 197, 394, 591, 788, 985, 1182, 1831, 1970, 2364, 2955, 3662, 3940, 5493, 5910, 7324, 9155, 10986, 11820, 18310, 21972, 27465, 36620, 54930, 109860, 360707, 721414, 1082121, 1442828, 1803535, 2164242, 3607070, 4328484, 5410605, 7214140, 10821210, 21642420]

約数ペア:

[(1, 21642420), (2, 10821210), (3, 7214140), (4, 5410605), (5, 4328484), (6, 3607070), (10, 2164242), (12, 1803535), (15, 1442828), (20, 1082121), (30, 721414), (60, 360707), (197, 109860), (394, 54930), (591, 36620), (788, 27465), (985, 21972), (1182, 18310), (1831, 11820), (1970, 10986), (2364, 9155), (2955, 7324), (3662, 5910), (3940, 5493)]