20481550

素因数分解:

$2^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:253

約数の個数: 48

約数和(自身を含む): 39809952

約数和(自身を除く): 19328402

約数列:

[1, 2, 5, 10, 25, 41, 50, 82, 97, 103, 194, 205, 206, 410, 485, 515, 970, 1025, 1030, 2050, 2425, 2575, 3977, 4223, 4850, 5150, 7954, 8446, 9991, 19885, 19982, 21115, 39770, 42230, 49955, 99425, 99910, 105575, 198850, 211150, 249775, 409631, 499550, 819262, 2048155, 4096310, 10240775, 20481550]

約数ペア:

[(1, 20481550), (2, 10240775), (5, 4096310), (10, 2048155), (25, 819262), (41, 499550), (50, 409631), (82, 249775), (97, 211150), (103, 198850), (194, 105575), (205, 99910), (206, 99425), (410, 49955), (485, 42230), (515, 39770), (970, 21115), (1025, 19982), (1030, 19885), (2050, 9991), (2425, 8446), (2575, 7954), (3977, 5150), (4223, 4850)]