20191780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{233}}^1\times {\mathrm{619}}^1$

素因数の和:868

約数の個数: 48

約数和(自身を含む): 48746880

約数和(自身を除く): 28555100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 233, 466, 619, 932, 1165, 1238, 1631, 2330, 2476, 3095, 3262, 4333, 4660, 6190, 6524, 8155, 8666, 12380, 16310, 17332, 21665, 32620, 43330, 86660, 144227, 288454, 576908, 721135, 1009589, 1442270, 2019178, 2884540, 4038356, 5047945, 10095890, 20191780]

約数ペア:

[(1, 20191780), (2, 10095890), (4, 5047945), (5, 4038356), (7, 2884540), (10, 2019178), (14, 1442270), (20, 1009589), (28, 721135), (35, 576908), (70, 288454), (140, 144227), (233, 86660), (466, 43330), (619, 32620), (932, 21665), (1165, 17332), (1238, 16310), (1631, 12380), (2330, 8666), (2476, 8155), (3095, 6524), (3262, 6190), (4333, 4660)]