21868990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{373}}^1$

素因数の和:445

約数の個数: 64

約数和(自身を含む): 47500992

約数和(自身を除く): 25632002

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 41, 55, 65, 82, 110, 130, 143, 205, 286, 373, 410, 451, 533, 715, 746, 902, 1066, 1430, 1865, 2255, 2665, 3730, 4103, 4510, 4849, 5330, 5863, 8206, 9698, 11726, 15293, 20515, 24245, 29315, 30586, 41030, 48490, 53339, 58630, 76465, 106678, 152930, 168223, 198809, 266695, 336446, 397618, 533390, 841115, 994045, 1682230, 1988090, 2186899, 4373798, 10934495, 21868990]

約数ペア:

[(1, 21868990), (2, 10934495), (5, 4373798), (10, 2186899), (11, 1988090), (13, 1682230), (22, 994045), (26, 841115), (41, 533390), (55, 397618), (65, 336446), (82, 266695), (110, 198809), (130, 168223), (143, 152930), (205, 106678), (286, 76465), (373, 58630), (410, 53339), (451, 48490), (533, 41030), (715, 30586), (746, 29315), (902, 24245), (1066, 20515), (1430, 15293), (1865, 11726), (2255, 9698), (2665, 8206), (3730, 5863), (4103, 5330), (4510, 4849)]