20249900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{449}}^1$

素因数の和:515

約数の個数: 72

約数和(自身を含む): 49215600

約数和(自身を除く): 28965700

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 41, 44, 50, 55, 82, 100, 110, 164, 205, 220, 275, 410, 449, 451, 550, 820, 898, 902, 1025, 1100, 1796, 1804, 2050, 2245, 2255, 4100, 4490, 4510, 4939, 8980, 9020, 9878, 11225, 11275, 18409, 19756, 22450, 22550, 24695, 36818, 44900, 45100, 49390, 73636, 92045, 98780, 123475, 184090, 202499, 246950, 368180, 404998, 460225, 493900, 809996, 920450, 1012495, 1840900, 2024990, 4049980, 5062475, 10124950, 20249900]

約数ペア:

[(1, 20249900), (2, 10124950), (4, 5062475), (5, 4049980), (10, 2024990), (11, 1840900), (20, 1012495), (22, 920450), (25, 809996), (41, 493900), (44, 460225), (50, 404998), (55, 368180), (82, 246950), (100, 202499), (110, 184090), (164, 123475), (205, 98780), (220, 92045), (275, 73636), (410, 49390), (449, 45100), (451, 44900), (550, 36818), (820, 24695), (898, 22550), (902, 22450), (1025, 19756), (1100, 18409), (1796, 11275), (1804, 11225), (2050, 9878), (2245, 9020), (2255, 8980), (4100, 4939), (4490, 4510)]