21042800

素因数分解:

$2^4\times 5^2\times {\mathrm{31}}^1\times {\mathrm{1697}}^1$

素因数の和:1746

約数の個数: 60

約数和(自身を含む): 52216896

約数和(自身を除く): 31174096

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 40, 50, 62, 80, 100, 124, 155, 200, 248, 310, 400, 496, 620, 775, 1240, 1550, 1697, 2480, 3100, 3394, 6200, 6788, 8485, 12400, 13576, 16970, 27152, 33940, 42425, 52607, 67880, 84850, 105214, 135760, 169700, 210428, 263035, 339400, 420856, 526070, 678800, 841712, 1052140, 1315175, 2104280, 2630350, 4208560, 5260700, 10521400, 21042800]

約数ペア:

[(1, 21042800), (2, 10521400), (4, 5260700), (5, 4208560), (8, 2630350), (10, 2104280), (16, 1315175), (20, 1052140), (25, 841712), (31, 678800), (40, 526070), (50, 420856), (62, 339400), (80, 263035), (100, 210428), (124, 169700), (155, 135760), (200, 105214), (248, 84850), (310, 67880), (400, 52607), (496, 42425), (620, 33940), (775, 27152), (1240, 16970), (1550, 13576), (1697, 12400), (2480, 8485), (3100, 6788), (3394, 6200)]