20390344

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{607}}^1$

素因数の和:662

約数の個数: 64

約数和(自身を含む): 45964800

約数和(自身を除く): 25574456

約数列:

[1, 2, 4, 8, 13, 17, 19, 26, 34, 38, 52, 68, 76, 104, 136, 152, 221, 247, 323, 442, 494, 607, 646, 884, 988, 1214, 1292, 1768, 1976, 2428, 2584, 4199, 4856, 7891, 8398, 10319, 11533, 15782, 16796, 20638, 23066, 31564, 33592, 41276, 46132, 63128, 82552, 92264, 134147, 149929, 196061, 268294, 299858, 392122, 536588, 599716, 784244, 1073176, 1199432, 1568488, 2548793, 5097586, 10195172, 20390344]

約数ペア:

[(1, 20390344), (2, 10195172), (4, 5097586), (8, 2548793), (13, 1568488), (17, 1199432), (19, 1073176), (26, 784244), (34, 599716), (38, 536588), (52, 392122), (68, 299858), (76, 268294), (104, 196061), (136, 149929), (152, 134147), (221, 92264), (247, 82552), (323, 63128), (442, 46132), (494, 41276), (607, 33592), (646, 31564), (884, 23066), (988, 20638), (1214, 16796), (1292, 15782), (1768, 11533), (1976, 10319), (2428, 8398), (2584, 7891), (4199, 4856)]