20820695

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{281}}^1$

素因数の和:395

約数の個数: 32

約数和(自身を含む): 30049920

約数和(自身を除く): 9229225

約数列:

[1, 5, 7, 29, 35, 73, 145, 203, 281, 365, 511, 1015, 1405, 1967, 2117, 2555, 8149, 9835, 10585, 14819, 20513, 40745, 57043, 74095, 102565, 143591, 285215, 594877, 717955, 2974385, 4164139, 20820695]

約数ペア:

[(1, 20820695), (5, 4164139), (7, 2974385), (29, 717955), (35, 594877), (73, 285215), (145, 143591), (203, 102565), (281, 74095), (365, 57043), (511, 40745), (1015, 20513), (1405, 14819), (1967, 10585), (2117, 9835), (2555, 8149)]