20545520

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15107}}^1$

素因数の和:15137

約数の個数: 40

約数和(自身を含む): 50581584

約数和(自身を除く): 30036064

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15107, 30214, 60428, 75535, 120856, 151070, 241712, 256819, 302140, 513638, 604280, 1027276, 1208560, 1284095, 2054552, 2568190, 4109104, 5136380, 10272760, 20545520]

約数ペア:

[(1, 20545520), (2, 10272760), (4, 5136380), (5, 4109104), (8, 2568190), (10, 2054552), (16, 1284095), (17, 1208560), (20, 1027276), (34, 604280), (40, 513638), (68, 302140), (80, 256819), (85, 241712), (136, 151070), (170, 120856), (272, 75535), (340, 60428), (680, 30214), (1360, 15107)]