20748455

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1471}}^1$

素因数の和:1527

約数の個数: 32

約数和(自身を含む): 31653888

約数和(自身を除く): 10905433

約数列:

[1, 5, 7, 13, 31, 35, 65, 91, 155, 217, 403, 455, 1085, 1471, 2015, 2821, 7355, 10297, 14105, 19123, 45601, 51485, 95615, 133861, 228005, 319207, 592813, 669305, 1596035, 2964065, 4149691, 20748455]

約数ペア:

[(1, 20748455), (5, 4149691), (7, 2964065), (13, 1596035), (31, 669305), (35, 592813), (65, 319207), (91, 228005), (155, 133861), (217, 95615), (403, 51485), (455, 45601), (1085, 19123), (1471, 14105), (2015, 10297), (2821, 7355)]