21313971

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{2843}}^1$

素因数の和:2880

約数の個数: 36

約数和(自身を含む): 37933272

約数和(自身を除く): 16619301

約数列:

[1, 3, 7, 9, 17, 21, 49, 51, 63, 119, 147, 153, 357, 441, 833, 1071, 2499, 2843, 7497, 8529, 19901, 25587, 48331, 59703, 139307, 144993, 179109, 338317, 417921, 434979, 1014951, 1253763, 2368219, 3044853, 7104657, 21313971]

約数ペア:

[(1, 21313971), (3, 7104657), (7, 3044853), (9, 2368219), (17, 1253763), (21, 1014951), (49, 434979), (51, 417921), (63, 338317), (119, 179109), (147, 144993), (153, 139307), (357, 59703), (441, 48331), (833, 25587), (1071, 19901), (2499, 8529), (2843, 7497)]