20573390

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{41}}^1\times {\mathrm{139}}^1$

素因数の和:225

約数の個数: 48

約数和(自身を含む): 40325040

約数和(自身を除く): 19751650

約数列:

[1, 2, 5, 10, 19, 38, 41, 82, 95, 139, 190, 205, 278, 361, 410, 695, 722, 779, 1390, 1558, 1805, 2641, 3610, 3895, 5282, 5699, 7790, 11398, 13205, 14801, 26410, 28495, 29602, 50179, 56990, 74005, 100358, 108281, 148010, 216562, 250895, 501790, 541405, 1082810, 2057339, 4114678, 10286695, 20573390]

約数ペア:

[(1, 20573390), (2, 10286695), (5, 4114678), (10, 2057339), (19, 1082810), (38, 541405), (41, 501790), (82, 250895), (95, 216562), (139, 148010), (190, 108281), (205, 100358), (278, 74005), (361, 56990), (410, 50179), (695, 29602), (722, 28495), (779, 26410), (1390, 14801), (1558, 13205), (1805, 11398), (2641, 7790), (3610, 5699), (3895, 5282)]