21401250

素因数分解:

$2^1\times 3^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{439}}^1$

素因数の和:477

約数の個数: 80

約数和(自身を含む): 57731520

約数和(自身を除く): 36330270

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 25, 26, 30, 39, 50, 65, 75, 78, 125, 130, 150, 195, 250, 325, 375, 390, 439, 625, 650, 750, 878, 975, 1250, 1317, 1625, 1875, 1950, 2195, 2634, 3250, 3750, 4390, 4875, 5707, 6585, 8125, 9750, 10975, 11414, 13170, 16250, 17121, 21950, 24375, 28535, 32925, 34242, 48750, 54875, 57070, 65850, 85605, 109750, 142675, 164625, 171210, 274375, 285350, 329250, 428025, 548750, 713375, 823125, 856050, 1426750, 1646250, 2140125, 3566875, 4280250, 7133750, 10700625, 21401250]

約数ペア:

[(1, 21401250), (2, 10700625), (3, 7133750), (5, 4280250), (6, 3566875), (10, 2140125), (13, 1646250), (15, 1426750), (25, 856050), (26, 823125), (30, 713375), (39, 548750), (50, 428025), (65, 329250), (75, 285350), (78, 274375), (125, 171210), (130, 164625), (150, 142675), (195, 109750), (250, 85605), (325, 65850), (375, 57070), (390, 54875), (439, 48750), (625, 34242), (650, 32925), (750, 28535), (878, 24375), (975, 21950), (1250, 17121), (1317, 16250), (1625, 13170), (1875, 11414), (1950, 10975), (2195, 9750), (2634, 8125), (3250, 6585), (3750, 5707), (4390, 4875)]