17806420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{997}}^1$

素因数の和:1072

約数の個数: 48

約数和(自身を含む): 40239360

約数和(自身を除く): 22432940

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 47, 76, 94, 95, 188, 190, 235, 380, 470, 893, 940, 997, 1786, 1994, 3572, 3988, 4465, 4985, 8930, 9970, 17860, 18943, 19940, 37886, 46859, 75772, 93718, 94715, 187436, 189430, 234295, 378860, 468590, 890321, 937180, 1780642, 3561284, 4451605, 8903210, 17806420]

約数ペア:

[(1, 17806420), (2, 8903210), (4, 4451605), (5, 3561284), (10, 1780642), (19, 937180), (20, 890321), (38, 468590), (47, 378860), (76, 234295), (94, 189430), (95, 187436), (188, 94715), (190, 93718), (235, 75772), (380, 46859), (470, 37886), (893, 19940), (940, 18943), (997, 17860), (1786, 9970), (1994, 8930), (3572, 4985), (3988, 4465)]