21723620

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{353}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 48707568

約数和(自身を除く): 26983948

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 181, 340, 353, 362, 706, 724, 905, 1412, 1765, 1810, 3077, 3530, 3620, 6001, 6154, 7060, 12002, 12308, 15385, 24004, 30005, 30770, 60010, 61540, 63893, 120020, 127786, 255572, 319465, 638930, 1086181, 1277860, 2172362, 4344724, 5430905, 10861810, 21723620]

約数ペア:

[(1, 21723620), (2, 10861810), (4, 5430905), (5, 4344724), (10, 2172362), (17, 1277860), (20, 1086181), (34, 638930), (68, 319465), (85, 255572), (170, 127786), (181, 120020), (340, 63893), (353, 61540), (362, 60010), (706, 30770), (724, 30005), (905, 24004), (1412, 15385), (1765, 12308), (1810, 12002), (3077, 7060), (3530, 6154), (3620, 6001)]