20283100

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:199

約数の個数: 72

約数和(自身を含む): 46403280

約数和(自身を除く): 26120180

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 53, 86, 89, 100, 106, 172, 178, 212, 215, 265, 356, 430, 445, 530, 860, 890, 1060, 1075, 1325, 1780, 2150, 2225, 2279, 2650, 3827, 4300, 4450, 4558, 4717, 5300, 7654, 8900, 9116, 9434, 11395, 15308, 18868, 19135, 22790, 23585, 38270, 45580, 47170, 56975, 76540, 94340, 95675, 113950, 117925, 191350, 202831, 227900, 235850, 382700, 405662, 471700, 811324, 1014155, 2028310, 4056620, 5070775, 10141550, 20283100]

約数ペア:

[(1, 20283100), (2, 10141550), (4, 5070775), (5, 4056620), (10, 2028310), (20, 1014155), (25, 811324), (43, 471700), (50, 405662), (53, 382700), (86, 235850), (89, 227900), (100, 202831), (106, 191350), (172, 117925), (178, 113950), (212, 95675), (215, 94340), (265, 76540), (356, 56975), (430, 47170), (445, 45580), (530, 38270), (860, 23585), (890, 22790), (1060, 19135), (1075, 18868), (1325, 15308), (1780, 11395), (2150, 9434), (2225, 9116), (2279, 8900), (2650, 7654), (3827, 5300), (4300, 4717), (4450, 4558)]