21112240

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8513}}^1$

素因数の和:8557

約数の個数: 40

約数和(自身を含む): 50675328

約数和(自身を除く): 29563088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8513, 17026, 34052, 42565, 68104, 85130, 136208, 170260, 263903, 340520, 527806, 681040, 1055612, 1319515, 2111224, 2639030, 4222448, 5278060, 10556120, 21112240]

約数ペア:

[(1, 21112240), (2, 10556120), (4, 5278060), (5, 4222448), (8, 2639030), (10, 2111224), (16, 1319515), (20, 1055612), (31, 681040), (40, 527806), (62, 340520), (80, 263903), (124, 170260), (155, 136208), (248, 85130), (310, 68104), (496, 42565), (620, 34052), (1240, 17026), (2480, 8513)]