20449150

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{167}}^1$

素因数の和:289

約数の個数: 48

約数和(自身を含む): 39997440

約数和(自身を除く): 19548290

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 79, 155, 158, 167, 310, 334, 395, 775, 790, 835, 1550, 1670, 1975, 2449, 3950, 4175, 4898, 5177, 8350, 10354, 12245, 13193, 24490, 25885, 26386, 51770, 61225, 65965, 122450, 129425, 131930, 258850, 329825, 408983, 659650, 817966, 2044915, 4089830, 10224575, 20449150]

約数ペア:

[(1, 20449150), (2, 10224575), (5, 4089830), (10, 2044915), (25, 817966), (31, 659650), (50, 408983), (62, 329825), (79, 258850), (155, 131930), (158, 129425), (167, 122450), (310, 65965), (334, 61225), (395, 51770), (775, 26386), (790, 25885), (835, 24490), (1550, 13193), (1670, 12245), (1975, 10354), (2449, 8350), (3950, 5177), (4175, 4898)]