21485600

素因数分解:

$2^5\times 5^2\times {\mathrm{107}}^1\times {\mathrm{251}}^1$

素因数の和:378

約数の個数: 72

約数和(自身を含む): 53152848

約数和(自身を除く): 31667248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 107, 160, 200, 214, 251, 400, 428, 502, 535, 800, 856, 1004, 1070, 1255, 1712, 2008, 2140, 2510, 2675, 3424, 4016, 4280, 5020, 5350, 6275, 8032, 8560, 10040, 10700, 12550, 17120, 20080, 21400, 25100, 26857, 40160, 42800, 50200, 53714, 85600, 100400, 107428, 134285, 200800, 214856, 268570, 429712, 537140, 671425, 859424, 1074280, 1342850, 2148560, 2685700, 4297120, 5371400, 10742800, 21485600]

約数ペア:

[(1, 21485600), (2, 10742800), (4, 5371400), (5, 4297120), (8, 2685700), (10, 2148560), (16, 1342850), (20, 1074280), (25, 859424), (32, 671425), (40, 537140), (50, 429712), (80, 268570), (100, 214856), (107, 200800), (160, 134285), (200, 107428), (214, 100400), (251, 85600), (400, 53714), (428, 50200), (502, 42800), (535, 40160), (800, 26857), (856, 25100), (1004, 21400), (1070, 20080), (1255, 17120), (1712, 12550), (2008, 10700), (2140, 10040), (2510, 8560), (2675, 8032), (3424, 6275), (4016, 5350), (4280, 5020)]