20721850

素因数分解:

$2^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{487}}^1$

素因数の和:559

約数の個数: 48

約数和(自身を含む): 41390208

約数和(自身を除く): 20668358

約数列:

[1, 2, 5, 10, 23, 25, 37, 46, 50, 74, 115, 185, 230, 370, 487, 575, 851, 925, 974, 1150, 1702, 1850, 2435, 4255, 4870, 8510, 11201, 12175, 18019, 21275, 22402, 24350, 36038, 42550, 56005, 90095, 112010, 180190, 280025, 414437, 450475, 560050, 828874, 900950, 2072185, 4144370, 10360925, 20721850]

約数ペア:

[(1, 20721850), (2, 10360925), (5, 4144370), (10, 2072185), (23, 900950), (25, 828874), (37, 560050), (46, 450475), (50, 414437), (74, 280025), (115, 180190), (185, 112010), (230, 90095), (370, 56005), (487, 42550), (575, 36038), (851, 24350), (925, 22402), (974, 21275), (1150, 18019), (1702, 12175), (1850, 11201), (2435, 8510), (4255, 4870)]