21383760

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{641}}^1$

素因数の和:796

約数の個数: 80

約数和(自身を含む): 66870720

約数和(自身を除く): 45486960

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 139, 240, 278, 417, 556, 641, 695, 834, 1112, 1282, 1390, 1668, 1923, 2085, 2224, 2564, 2780, 3205, 3336, 3846, 4170, 5128, 5560, 6410, 6672, 7692, 8340, 9615, 10256, 11120, 12820, 15384, 16680, 19230, 25640, 30768, 33360, 38460, 51280, 76920, 89099, 153840, 178198, 267297, 356396, 445495, 534594, 712792, 890990, 1069188, 1336485, 1425584, 1781980, 2138376, 2672970, 3563960, 4276752, 5345940, 7127920, 10691880, 21383760]

約数ペア:

[(1, 21383760), (2, 10691880), (3, 7127920), (4, 5345940), (5, 4276752), (6, 3563960), (8, 2672970), (10, 2138376), (12, 1781980), (15, 1425584), (16, 1336485), (20, 1069188), (24, 890990), (30, 712792), (40, 534594), (48, 445495), (60, 356396), (80, 267297), (120, 178198), (139, 153840), (240, 89099), (278, 76920), (417, 51280), (556, 38460), (641, 33360), (695, 30768), (834, 25640), (1112, 19230), (1282, 16680), (1390, 15384), (1668, 12820), (1923, 11120), (2085, 10256), (2224, 9615), (2564, 8340), (2780, 7692), (3205, 6672), (3336, 6410), (3846, 5560), (4170, 5128)]