21279993

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1\times {\mathrm{127}}^1$

素因数の和:317

約数の個数: 32

約数和(自身を含む): 33423360

約数和(自身を除く): 12143367

約数列:

[1, 3, 7, 21, 79, 101, 127, 237, 303, 381, 553, 707, 889, 1659, 2121, 2667, 7979, 10033, 12827, 23937, 30099, 38481, 55853, 70231, 89789, 167559, 210693, 269367, 1013333, 3039999, 7093331, 21279993]

約数ペア:

[(1, 21279993), (3, 7093331), (7, 3039999), (21, 1013333), (79, 269367), (101, 210693), (127, 167559), (237, 89789), (303, 70231), (381, 55853), (553, 38481), (707, 30099), (889, 23937), (1659, 12827), (2121, 10033), (2667, 7979)]