20560275

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{137}}^1$

素因数の和:205

約数の個数: 72

約数和(自身を含む): 40042080

約数和(自身を除く): 19481805

約数列:

[1, 3, 5, 9, 15, 23, 25, 29, 45, 69, 75, 87, 115, 137, 145, 207, 225, 261, 345, 411, 435, 575, 667, 685, 725, 1035, 1233, 1305, 1725, 2001, 2055, 2175, 3151, 3335, 3425, 3973, 5175, 6003, 6165, 6525, 9453, 10005, 10275, 11919, 15755, 16675, 19865, 28359, 30015, 30825, 35757, 47265, 50025, 59595, 78775, 91379, 99325, 141795, 150075, 178785, 236325, 274137, 297975, 456895, 708975, 822411, 893925, 1370685, 2284475, 4112055, 6853425, 20560275]

約数ペア:

[(1, 20560275), (3, 6853425), (5, 4112055), (9, 2284475), (15, 1370685), (23, 893925), (25, 822411), (29, 708975), (45, 456895), (69, 297975), (75, 274137), (87, 236325), (115, 178785), (137, 150075), (145, 141795), (207, 99325), (225, 91379), (261, 78775), (345, 59595), (411, 50025), (435, 47265), (575, 35757), (667, 30825), (685, 30015), (725, 28359), (1035, 19865), (1233, 16675), (1305, 15755), (1725, 11919), (2001, 10275), (2055, 10005), (2175, 9453), (3151, 6525), (3335, 6165), (3425, 6003), (3973, 5175)]