21408904

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{1153}}^1$

素因数の和:1381

約数の個数: 32

約数和(自身を含む): 44036640

約数和(自身を除く): 22627736

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 211, 422, 844, 1153, 1688, 2306, 2321, 4612, 4642, 9224, 9284, 12683, 18568, 25366, 50732, 101464, 243283, 486566, 973132, 1946264, 2676113, 5352226, 10704452, 21408904]

約数ペア:

[(1, 21408904), (2, 10704452), (4, 5352226), (8, 2676113), (11, 1946264), (22, 973132), (44, 486566), (88, 243283), (211, 101464), (422, 50732), (844, 25366), (1153, 18568), (1688, 12683), (2306, 9284), (2321, 9224), (4612, 4642)]