20909680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23761}}^1$

素因数の和:23785

約数の個数: 40

約数和(自身を含む): 53036784

約数和(自身を除く): 32127104

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23761, 47522, 95044, 118805, 190088, 237610, 261371, 380176, 475220, 522742, 950440, 1045484, 1306855, 1900880, 2090968, 2613710, 4181936, 5227420, 10454840, 20909680]

約数ペア:

[(1, 20909680), (2, 10454840), (4, 5227420), (5, 4181936), (8, 2613710), (10, 2090968), (11, 1900880), (16, 1306855), (20, 1045484), (22, 950440), (40, 522742), (44, 475220), (55, 380176), (80, 261371), (88, 237610), (110, 190088), (176, 118805), (220, 95044), (440, 47522), (880, 23761)]