18728475

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:464

約数の個数: 48

約数和(自身を含む): 33756768

約数和(自身を除く): 15028293

約数列:

[1, 3, 5, 15, 17, 25, 37, 51, 75, 85, 111, 185, 255, 397, 425, 555, 629, 925, 1191, 1275, 1887, 1985, 2775, 3145, 5955, 6749, 9435, 9925, 14689, 15725, 20247, 29775, 33745, 44067, 47175, 73445, 101235, 168725, 220335, 249713, 367225, 506175, 749139, 1101675, 1248565, 3745695, 6242825, 18728475]

約数ペア:

[(1, 18728475), (3, 6242825), (5, 3745695), (15, 1248565), (17, 1101675), (25, 749139), (37, 506175), (51, 367225), (75, 249713), (85, 220335), (111, 168725), (185, 101235), (255, 73445), (397, 47175), (425, 44067), (555, 33745), (629, 29775), (925, 20247), (1191, 15725), (1275, 14689), (1887, 9925), (1985, 9435), (2775, 6749), (3145, 5955)]