21681375

素因数分解:

$3^1\times 5^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{179}}^1$

素因数の和:233

約数の個数: 64

約数和(自身を含む): 40435200

約数和(自身を除く): 18753825

約数列:

[1, 3, 5, 15, 17, 19, 25, 51, 57, 75, 85, 95, 125, 179, 255, 285, 323, 375, 425, 475, 537, 895, 969, 1275, 1425, 1615, 2125, 2375, 2685, 3043, 3401, 4475, 4845, 6375, 7125, 8075, 9129, 10203, 13425, 15215, 17005, 22375, 24225, 40375, 45645, 51015, 57817, 67125, 76075, 85025, 121125, 173451, 228225, 255075, 289085, 380375, 425125, 867255, 1141125, 1275375, 1445425, 4336275, 7227125, 21681375]

約数ペア:

[(1, 21681375), (3, 7227125), (5, 4336275), (15, 1445425), (17, 1275375), (19, 1141125), (25, 867255), (51, 425125), (57, 380375), (75, 289085), (85, 255075), (95, 228225), (125, 173451), (179, 121125), (255, 85025), (285, 76075), (323, 67125), (375, 57817), (425, 51015), (475, 45645), (537, 40375), (895, 24225), (969, 22375), (1275, 17005), (1425, 15215), (1615, 13425), (2125, 10203), (2375, 9129), (2685, 8075), (3043, 7125), (3401, 6375), (4475, 4845)]