20758640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1951}}^1$

素因数の和:1990

約数の個数: 80

約数和(自身を含む): 58091520

約数和(自身を除く): 37332880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 38, 40, 56, 70, 76, 80, 95, 112, 133, 140, 152, 190, 266, 280, 304, 380, 532, 560, 665, 760, 1064, 1330, 1520, 1951, 2128, 2660, 3902, 5320, 7804, 9755, 10640, 13657, 15608, 19510, 27314, 31216, 37069, 39020, 54628, 68285, 74138, 78040, 109256, 136570, 148276, 156080, 185345, 218512, 259483, 273140, 296552, 370690, 518966, 546280, 593104, 741380, 1037932, 1092560, 1297415, 1482760, 2075864, 2594830, 2965520, 4151728, 5189660, 10379320, 20758640]

約数ペア:

[(1, 20758640), (2, 10379320), (4, 5189660), (5, 4151728), (7, 2965520), (8, 2594830), (10, 2075864), (14, 1482760), (16, 1297415), (19, 1092560), (20, 1037932), (28, 741380), (35, 593104), (38, 546280), (40, 518966), (56, 370690), (70, 296552), (76, 273140), (80, 259483), (95, 218512), (112, 185345), (133, 156080), (140, 148276), (152, 136570), (190, 109256), (266, 78040), (280, 74138), (304, 68285), (380, 54628), (532, 39020), (560, 37069), (665, 31216), (760, 27314), (1064, 19510), (1330, 15608), (1520, 13657), (1951, 10640), (2128, 9755), (2660, 7804), (3902, 5320)]