21214840

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{10007}}^1$

素因数の和:10071

約数の個数: 32

約数和(自身を含む): 48638880

約数和(自身を除く): 27424040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 10007, 20014, 40028, 50035, 80056, 100070, 200140, 400280, 530371, 1060742, 2121484, 2651855, 4242968, 5303710, 10607420, 21214840]

約数ペア:

[(1, 21214840), (2, 10607420), (4, 5303710), (5, 4242968), (8, 2651855), (10, 2121484), (20, 1060742), (40, 530371), (53, 400280), (106, 200140), (212, 100070), (265, 80056), (424, 50035), (530, 40028), (1060, 20014), (2120, 10007)]