20402805

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:174

約数の個数: 64

約数和(自身を含む): 37324800

約数和(自身を除く): 16921995

約数列:

[1, 3, 5, 15, 17, 29, 31, 51, 85, 87, 89, 93, 145, 155, 255, 267, 435, 445, 465, 493, 527, 899, 1335, 1479, 1513, 1581, 2465, 2581, 2635, 2697, 2759, 4495, 4539, 7395, 7565, 7743, 7905, 8277, 12905, 13485, 13795, 15283, 22695, 38715, 41385, 43877, 45849, 46903, 76415, 80011, 131631, 140709, 219385, 229245, 234515, 240033, 400055, 658155, 703545, 1200165, 1360187, 4080561, 6800935, 20402805]

約数ペア:

[(1, 20402805), (3, 6800935), (5, 4080561), (15, 1360187), (17, 1200165), (29, 703545), (31, 658155), (51, 400055), (85, 240033), (87, 234515), (89, 229245), (93, 219385), (145, 140709), (155, 131631), (255, 80011), (267, 76415), (435, 46903), (445, 45849), (465, 43877), (493, 41385), (527, 38715), (899, 22695), (1335, 15283), (1479, 13795), (1513, 13485), (1581, 12905), (2465, 8277), (2581, 7905), (2635, 7743), (2697, 7565), (2759, 7395), (4495, 4539)]