21242720

素因数分解:

$2^5\times 5^1\times {\mathrm{103}}^1\times {\mathrm{1289}}^1$

素因数の和:1407

約数の個数: 48

約数和(自身を含む): 50712480

約数和(自身を除く): 29469760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 103, 160, 206, 412, 515, 824, 1030, 1289, 1648, 2060, 2578, 3296, 4120, 5156, 6445, 8240, 10312, 12890, 16480, 20624, 25780, 41248, 51560, 103120, 132767, 206240, 265534, 531068, 663835, 1062136, 1327670, 2124272, 2655340, 4248544, 5310680, 10621360, 21242720]

約数ペア:

[(1, 21242720), (2, 10621360), (4, 5310680), (5, 4248544), (8, 2655340), (10, 2124272), (16, 1327670), (20, 1062136), (32, 663835), (40, 531068), (80, 265534), (103, 206240), (160, 132767), (206, 103120), (412, 51560), (515, 41248), (824, 25780), (1030, 20624), (1289, 16480), (1648, 12890), (2060, 10312), (2578, 8240), (3296, 6445), (4120, 5156)]