21000398500

素因数分解:

$2^2\times 5^3\times {\mathrm{157}}^1\times {\mathrm{267521}}^1$

素因数の和:267697

約数の個数: 48

約数和(自身を含む): 46157175792

約数和(自身を除く): 25156777292

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 157, 250, 314, 500, 628, 785, 1570, 3140, 3925, 7850, 15700, 19625, 39250, 78500, 267521, 535042, 1070084, 1337605, 2675210, 5350420, 6688025, 13376050, 26752100, 33440125, 42000797, 66880250, 84001594, 133760500, 168003188, 210003985, 420007970, 840015940, 1050019925, 2100039850, 4200079700, 5250099625, 10500199250, 21000398500]

約数ペア:

[(1, 21000398500), (2, 10500199250), (4, 5250099625), (5, 4200079700), (10, 2100039850), (20, 1050019925), (25, 840015940), (50, 420007970), (100, 210003985), (125, 168003188), (157, 133760500), (250, 84001594), (314, 66880250), (500, 42000797), (628, 33440125), (785, 26752100), (1570, 13376050), (3140, 6688025), (3925, 5350420), (7850, 2675210), (15700, 1337605), (19625, 1070084), (39250, 535042), (78500, 267521)]