20877640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{431}}^1$

素因数の和:622

約数の個数: 64

約数和(自身を含む): 54120960

約数和(自身を除く): 33243320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 173, 280, 346, 431, 692, 862, 865, 1211, 1384, 1724, 1730, 2155, 2422, 3017, 3448, 3460, 4310, 4844, 6034, 6055, 6920, 8620, 9688, 12068, 12110, 15085, 17240, 24136, 24220, 30170, 48440, 60340, 74563, 120680, 149126, 298252, 372815, 521941, 596504, 745630, 1043882, 1491260, 2087764, 2609705, 2982520, 4175528, 5219410, 10438820, 20877640]

約数ペア:

[(1, 20877640), (2, 10438820), (4, 5219410), (5, 4175528), (7, 2982520), (8, 2609705), (10, 2087764), (14, 1491260), (20, 1043882), (28, 745630), (35, 596504), (40, 521941), (56, 372815), (70, 298252), (140, 149126), (173, 120680), (280, 74563), (346, 60340), (431, 48440), (692, 30170), (862, 24220), (865, 24136), (1211, 17240), (1384, 15085), (1724, 12110), (1730, 12068), (2155, 9688), (2422, 8620), (3017, 6920), (3448, 6055), (3460, 6034), (4310, 4844)]