21001953

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{661}}^1$

素因数の和:777

約数の個数: 32

約数和(自身を含む): 34318080

約数和(自身を除く): 13316127

約数列:

[1, 3, 7, 17, 21, 51, 89, 119, 267, 357, 623, 661, 1513, 1869, 1983, 4539, 4627, 10591, 11237, 13881, 31773, 33711, 58829, 78659, 176487, 235977, 411803, 1000093, 1235409, 3000279, 7000651, 21001953]

約数ペア:

[(1, 21001953), (3, 7000651), (7, 3000279), (17, 1235409), (21, 1000093), (51, 411803), (89, 235977), (119, 176487), (267, 78659), (357, 58829), (623, 33711), (661, 31773), (1513, 13881), (1869, 11237), (1983, 10591), (4539, 4627)]