51721905

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:210

約数の個数: 64

約数和(自身を含む): 92378880

約数和(自身を除く): 40656975

約数列:

[1, 3, 5, 15, 17, 43, 51, 53, 85, 89, 129, 159, 215, 255, 265, 267, 445, 645, 731, 795, 901, 1335, 1513, 2193, 2279, 2703, 3655, 3827, 4505, 4539, 4717, 6837, 7565, 10965, 11395, 11481, 13515, 14151, 19135, 22695, 23585, 34185, 38743, 57405, 65059, 70755, 80189, 116229, 193715, 195177, 202831, 240567, 325295, 400945, 581145, 608493, 975885, 1014155, 1202835, 3042465, 3448127, 10344381, 17240635, 51721905]

約数ペア:

[(1, 51721905), (3, 17240635), (5, 10344381), (15, 3448127), (17, 3042465), (43, 1202835), (51, 1014155), (53, 975885), (85, 608493), (89, 581145), (129, 400945), (159, 325295), (215, 240567), (255, 202831), (265, 195177), (267, 193715), (445, 116229), (645, 80189), (731, 70755), (795, 65059), (901, 57405), (1335, 38743), (1513, 34185), (2193, 23585), (2279, 22695), (2703, 19135), (3655, 14151), (3827, 13515), (4505, 11481), (4539, 11395), (4717, 10965), (6837, 7565)]