21107580

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27061}}^1$

素因数の和:27086

約数の個数: 48

約数和(自身を含む): 63649824

約数和(自身を除く): 42542244

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27061, 54122, 81183, 108244, 135305, 162366, 270610, 324732, 351793, 405915, 541220, 703586, 811830, 1055379, 1407172, 1623660, 1758965, 2110758, 3517930, 4221516, 5276895, 7035860, 10553790, 21107580]

約数ペア:

[(1, 21107580), (2, 10553790), (3, 7035860), (4, 5276895), (5, 4221516), (6, 3517930), (10, 2110758), (12, 1758965), (13, 1623660), (15, 1407172), (20, 1055379), (26, 811830), (30, 703586), (39, 541220), (52, 405915), (60, 351793), (65, 324732), (78, 270610), (130, 162366), (156, 135305), (195, 108244), (260, 81183), (390, 54122), (780, 27061)]