20957500

素因数分解:

$2^2\times 5^4\times {\mathrm{83}}^1\times {\mathrm{101}}^1$

素因数の和:208

約数の個数: 60

約数和(自身を含む): 46841256

約数和(自身を除く): 25883756

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 83, 100, 101, 125, 166, 202, 250, 332, 404, 415, 500, 505, 625, 830, 1010, 1250, 1660, 2020, 2075, 2500, 2525, 4150, 5050, 8300, 8383, 10100, 10375, 12625, 16766, 20750, 25250, 33532, 41500, 41915, 50500, 51875, 63125, 83830, 103750, 126250, 167660, 207500, 209575, 252500, 419150, 838300, 1047875, 2095750, 4191500, 5239375, 10478750, 20957500]

約数ペア:

[(1, 20957500), (2, 10478750), (4, 5239375), (5, 4191500), (10, 2095750), (20, 1047875), (25, 838300), (50, 419150), (83, 252500), (100, 209575), (101, 207500), (125, 167660), (166, 126250), (202, 103750), (250, 83830), (332, 63125), (404, 51875), (415, 50500), (500, 41915), (505, 41500), (625, 33532), (830, 25250), (1010, 20750), (1250, 16766), (1660, 12625), (2020, 10375), (2075, 10100), (2500, 8383), (2525, 8300), (4150, 5050)]