18863920

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{173}}^1$

素因数の和:262

約数の個数: 80

約数和(自身を含む): 46604160

約数和(自身を除く): 27740240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 47, 58, 80, 94, 116, 145, 173, 188, 232, 235, 290, 346, 376, 464, 470, 580, 692, 752, 865, 940, 1160, 1363, 1384, 1730, 1880, 2320, 2726, 2768, 3460, 3760, 5017, 5452, 6815, 6920, 8131, 10034, 10904, 13630, 13840, 16262, 20068, 21808, 25085, 27260, 32524, 40136, 40655, 50170, 54520, 65048, 80272, 81310, 100340, 109040, 130096, 162620, 200680, 235799, 325240, 401360, 471598, 650480, 943196, 1178995, 1886392, 2357990, 3772784, 4715980, 9431960, 18863920]

約数ペア:

[(1, 18863920), (2, 9431960), (4, 4715980), (5, 3772784), (8, 2357990), (10, 1886392), (16, 1178995), (20, 943196), (29, 650480), (40, 471598), (47, 401360), (58, 325240), (80, 235799), (94, 200680), (116, 162620), (145, 130096), (173, 109040), (188, 100340), (232, 81310), (235, 80272), (290, 65048), (346, 54520), (376, 50170), (464, 40655), (470, 40136), (580, 32524), (692, 27260), (752, 25085), (865, 21808), (940, 20068), (1160, 16262), (1363, 13840), (1384, 13630), (1730, 10904), (1880, 10034), (2320, 8131), (2726, 6920), (2768, 6815), (3460, 5452), (3760, 5017)]