20620575

素因数分解:

$3^4\times 5^2\times {\mathrm{17}}^1\times {\mathrm{599}}^1$

素因数の和:638

約数の個数: 60

約数和(自身を含む): 40510800

約数和(自身を除く): 19890225

約数列:

[1, 3, 5, 9, 15, 17, 25, 27, 45, 51, 75, 81, 85, 135, 153, 225, 255, 405, 425, 459, 599, 675, 765, 1275, 1377, 1797, 2025, 2295, 2995, 3825, 5391, 6885, 8985, 10183, 11475, 14975, 16173, 26955, 30549, 34425, 44925, 48519, 50915, 80865, 91647, 134775, 152745, 242595, 254575, 274941, 404325, 458235, 763725, 824823, 1212975, 1374705, 2291175, 4124115, 6873525, 20620575]

約数ペア:

[(1, 20620575), (3, 6873525), (5, 4124115), (9, 2291175), (15, 1374705), (17, 1212975), (25, 824823), (27, 763725), (45, 458235), (51, 404325), (75, 274941), (81, 254575), (85, 242595), (135, 152745), (153, 134775), (225, 91647), (255, 80865), (405, 50915), (425, 48519), (459, 44925), (599, 34425), (675, 30549), (765, 26955), (1275, 16173), (1377, 14975), (1797, 11475), (2025, 10183), (2295, 8985), (2995, 6885), (3825, 5391)]