21918309

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{419}}^1$

素因数の和:529

約数の個数: 32

約数和(自身を含む): 34836480

約数和(自身を除く): 12918171

約数列:

[1, 3, 7, 21, 47, 53, 141, 159, 329, 371, 419, 987, 1113, 1257, 2491, 2933, 7473, 8799, 17437, 19693, 22207, 52311, 59079, 66621, 137851, 155449, 413553, 466347, 1043729, 3131187, 7306103, 21918309]

約数ペア:

[(1, 21918309), (3, 7306103), (7, 3131187), (21, 1043729), (47, 466347), (53, 413553), (141, 155449), (159, 137851), (329, 66621), (371, 59079), (419, 52311), (987, 22207), (1113, 19693), (1257, 17437), (2491, 8799), (2933, 7473)]