20725155

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{281}}^1$

素因数の和:452

約数の個数: 48

約数和(自身を含む): 39592800

約数和(自身を除く): 18867645

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 149, 165, 281, 447, 495, 745, 843, 1341, 1405, 1639, 2235, 2529, 3091, 4215, 4917, 6705, 8195, 9273, 12645, 14751, 15455, 24585, 27819, 41869, 46365, 73755, 125607, 139095, 209345, 376821, 460559, 628035, 1381677, 1884105, 2302795, 4145031, 6908385, 20725155]

約数ペア:

[(1, 20725155), (3, 6908385), (5, 4145031), (9, 2302795), (11, 1884105), (15, 1381677), (33, 628035), (45, 460559), (55, 376821), (99, 209345), (149, 139095), (165, 125607), (281, 73755), (447, 46365), (495, 41869), (745, 27819), (843, 24585), (1341, 15455), (1405, 14751), (1639, 12645), (2235, 9273), (2529, 8195), (3091, 6705), (4215, 4917)]