21644440

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{397}}^1$

素因数の和:484

約数の個数: 64

約数和(自身を含む): 51580800

約数和(自身を除く): 29936360

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 47, 58, 94, 116, 145, 188, 232, 235, 290, 376, 397, 470, 580, 794, 940, 1160, 1363, 1588, 1880, 1985, 2726, 3176, 3970, 5452, 6815, 7940, 10904, 11513, 13630, 15880, 18659, 23026, 27260, 37318, 46052, 54520, 57565, 74636, 92104, 93295, 115130, 149272, 186590, 230260, 373180, 460520, 541111, 746360, 1082222, 2164444, 2705555, 4328888, 5411110, 10822220, 21644440]

約数ペア:

[(1, 21644440), (2, 10822220), (4, 5411110), (5, 4328888), (8, 2705555), (10, 2164444), (20, 1082222), (29, 746360), (40, 541111), (47, 460520), (58, 373180), (94, 230260), (116, 186590), (145, 149272), (188, 115130), (232, 93295), (235, 92104), (290, 74636), (376, 57565), (397, 54520), (470, 46052), (580, 37318), (794, 27260), (940, 23026), (1160, 18659), (1363, 15880), (1588, 13630), (1880, 11513), (1985, 10904), (2726, 7940), (3176, 6815), (3970, 5452)]