21204380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1361}}^1$

素因数の和:1430

約数の個数: 48

約数和(自身を含む): 48051360

約数和(自身を除く): 26846980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 41, 76, 82, 95, 164, 190, 205, 380, 410, 779, 820, 1361, 1558, 2722, 3116, 3895, 5444, 6805, 7790, 13610, 15580, 25859, 27220, 51718, 55801, 103436, 111602, 129295, 223204, 258590, 279005, 517180, 558010, 1060219, 1116020, 2120438, 4240876, 5301095, 10602190, 21204380]

約数ペア:

[(1, 21204380), (2, 10602190), (4, 5301095), (5, 4240876), (10, 2120438), (19, 1116020), (20, 1060219), (38, 558010), (41, 517180), (76, 279005), (82, 258590), (95, 223204), (164, 129295), (190, 111602), (205, 103436), (380, 55801), (410, 51718), (779, 27220), (820, 25859), (1361, 15580), (1558, 13610), (2722, 7790), (3116, 6805), (3895, 5444)]