261981880

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{3413}}^1$

素因数の和:3544

約数の個数: 64

約数和(自身を含む): 626810400

約数和(自身を除く): 364828520

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 101, 152, 190, 202, 380, 404, 505, 760, 808, 1010, 1919, 2020, 3413, 3838, 4040, 6826, 7676, 9595, 13652, 15352, 17065, 19190, 27304, 34130, 38380, 64847, 68260, 76760, 129694, 136520, 259388, 324235, 344713, 518776, 648470, 689426, 1296940, 1378852, 1723565, 2593880, 2757704, 3447130, 6549547, 6894260, 13099094, 13788520, 26198188, 32747735, 52396376, 65495470, 130990940, 261981880]

約数ペア:

[(1, 261981880), (2, 130990940), (4, 65495470), (5, 52396376), (8, 32747735), (10, 26198188), (19, 13788520), (20, 13099094), (38, 6894260), (40, 6549547), (76, 3447130), (95, 2757704), (101, 2593880), (152, 1723565), (190, 1378852), (202, 1296940), (380, 689426), (404, 648470), (505, 518776), (760, 344713), (808, 324235), (1010, 259388), (1919, 136520), (2020, 129694), (3413, 76760), (3838, 68260), (4040, 64847), (6826, 38380), (7676, 34130), (9595, 27304), (13652, 19190), (15352, 17065)]