18740475

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:221

約数の個数: 72

約数和(自身を含む): 37237200

約数和(自身を除く): 18496725

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 43, 45, 65, 75, 117, 129, 149, 195, 215, 225, 325, 387, 447, 559, 585, 645, 745, 975, 1075, 1341, 1677, 1935, 1937, 2235, 2795, 2925, 3225, 3725, 5031, 5811, 6407, 6705, 8385, 9675, 9685, 11175, 13975, 17433, 19221, 25155, 29055, 32035, 33525, 41925, 48425, 57663, 83291, 87165, 96105, 125775, 145275, 160175, 249873, 288315, 416455, 435825, 480525, 749619, 1249365, 1441575, 2082275, 3748095, 6246825, 18740475]

約数ペア:

[(1, 18740475), (3, 6246825), (5, 3748095), (9, 2082275), (13, 1441575), (15, 1249365), (25, 749619), (39, 480525), (43, 435825), (45, 416455), (65, 288315), (75, 249873), (117, 160175), (129, 145275), (149, 125775), (195, 96105), (215, 87165), (225, 83291), (325, 57663), (387, 48425), (447, 41925), (559, 33525), (585, 32035), (645, 29055), (745, 25155), (975, 19221), (1075, 17433), (1341, 13975), (1677, 11175), (1935, 9685), (1937, 9675), (2235, 8385), (2795, 6705), (2925, 6407), (3225, 5811), (3725, 5031)]