17891920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:260

約数の個数: 80

約数和(自身を含む): 44640000

約数和(自身を除く): 26748080

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 79, 80, 95, 149, 152, 158, 190, 298, 304, 316, 380, 395, 596, 632, 745, 760, 790, 1192, 1264, 1490, 1501, 1520, 1580, 2384, 2831, 2980, 3002, 3160, 5662, 5960, 6004, 6320, 7505, 11324, 11771, 11920, 12008, 14155, 15010, 22648, 23542, 24016, 28310, 30020, 45296, 47084, 56620, 58855, 60040, 94168, 113240, 117710, 120080, 188336, 223649, 226480, 235420, 447298, 470840, 894596, 941680, 1118245, 1789192, 2236490, 3578384, 4472980, 8945960, 17891920]

約数ペア:

[(1, 17891920), (2, 8945960), (4, 4472980), (5, 3578384), (8, 2236490), (10, 1789192), (16, 1118245), (19, 941680), (20, 894596), (38, 470840), (40, 447298), (76, 235420), (79, 226480), (80, 223649), (95, 188336), (149, 120080), (152, 117710), (158, 113240), (190, 94168), (298, 60040), (304, 58855), (316, 56620), (380, 47084), (395, 45296), (596, 30020), (632, 28310), (745, 24016), (760, 23542), (790, 22648), (1192, 15010), (1264, 14155), (1490, 12008), (1501, 11920), (1520, 11771), (1580, 11324), (2384, 7505), (2831, 6320), (2980, 6004), (3002, 5960), (3160, 5662)]