21815913

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{1153}}^1$

素因数の和:1233

約数の個数: 32

約数和(自身を含む): 35894016

約数和(自身を除く): 14078103

約数列:

[1, 3, 7, 17, 21, 51, 53, 119, 159, 357, 371, 901, 1113, 1153, 2703, 3459, 6307, 8071, 18921, 19601, 24213, 58803, 61109, 137207, 183327, 411621, 427763, 1038853, 1283289, 3116559, 7271971, 21815913]

約数ペア:

[(1, 21815913), (3, 7271971), (7, 3116559), (17, 1283289), (21, 1038853), (51, 427763), (53, 411621), (119, 183327), (159, 137207), (357, 61109), (371, 58803), (901, 24213), (1113, 19601), (1153, 18921), (2703, 8071), (3459, 6307)]