51990440

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{167}}^1\times {\mathrm{181}}^1$

素因数の和:402

約数の個数: 64

約数和(自身を含む): 121080960

約数和(自身を除く): 69090520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 167, 172, 181, 215, 334, 344, 362, 430, 668, 724, 835, 860, 905, 1336, 1448, 1670, 1720, 1810, 3340, 3620, 6680, 7181, 7240, 7783, 14362, 15566, 28724, 30227, 31132, 35905, 38915, 57448, 60454, 62264, 71810, 77830, 120908, 143620, 151135, 155660, 241816, 287240, 302270, 311320, 604540, 1209080, 1299761, 2599522, 5199044, 6498805, 10398088, 12997610, 25995220, 51990440]

約数ペア:

[(1, 51990440), (2, 25995220), (4, 12997610), (5, 10398088), (8, 6498805), (10, 5199044), (20, 2599522), (40, 1299761), (43, 1209080), (86, 604540), (167, 311320), (172, 302270), (181, 287240), (215, 241816), (334, 155660), (344, 151135), (362, 143620), (430, 120908), (668, 77830), (724, 71810), (835, 62264), (860, 60454), (905, 57448), (1336, 38915), (1448, 35905), (1670, 31132), (1720, 30227), (1810, 28724), (3340, 15566), (3620, 14362), (6680, 7783), (7181, 7240)]