20992875

素因数分解:

$3^1\times 5^3\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:161

約数の個数: 64

約数和(自身を含む): 38413440

約数和(自身を除く): 17420565

約数列:

[1, 3, 5, 15, 17, 25, 37, 51, 75, 85, 89, 111, 125, 185, 255, 267, 375, 425, 445, 555, 629, 925, 1275, 1335, 1513, 1887, 2125, 2225, 2775, 3145, 3293, 4539, 4625, 6375, 6675, 7565, 9435, 9879, 11125, 13875, 15725, 16465, 22695, 33375, 37825, 47175, 49395, 55981, 78625, 82325, 113475, 167943, 189125, 235875, 246975, 279905, 411625, 567375, 839715, 1234875, 1399525, 4198575, 6997625, 20992875]

約数ペア:

[(1, 20992875), (3, 6997625), (5, 4198575), (15, 1399525), (17, 1234875), (25, 839715), (37, 567375), (51, 411625), (75, 279905), (85, 246975), (89, 235875), (111, 189125), (125, 167943), (185, 113475), (255, 82325), (267, 78625), (375, 55981), (425, 49395), (445, 47175), (555, 37825), (629, 33375), (925, 22695), (1275, 16465), (1335, 15725), (1513, 13875), (1887, 11125), (2125, 9879), (2225, 9435), (2775, 7565), (3145, 6675), (3293, 6375), (4539, 4625)]