21907910

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1\times {\mathrm{199}}^1$

素因数の和:416

約数の個数: 32

約数和(自身を含む): 40392000

約数和(自身を除く): 18484090

約数列:

[1, 2, 5, 10, 101, 109, 199, 202, 218, 398, 505, 545, 995, 1010, 1090, 1990, 11009, 20099, 21691, 22018, 40198, 43382, 55045, 100495, 108455, 110090, 200990, 216910, 2190791, 4381582, 10953955, 21907910]

約数ペア:

[(1, 21907910), (2, 10953955), (5, 4381582), (10, 2190791), (101, 216910), (109, 200990), (199, 110090), (202, 108455), (218, 100495), (398, 55045), (505, 43382), (545, 40198), (995, 22018), (1010, 21691), (1090, 20099), (1990, 11009)]