21070820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{2137}}^1$

素因数の和:2192

約数の個数: 48

約数和(自身を含む): 48489840

約数和(自身を除く): 27419020

約数列:

[1, 2, 4, 5, 10, 17, 20, 29, 34, 58, 68, 85, 116, 145, 170, 290, 340, 493, 580, 986, 1972, 2137, 2465, 4274, 4930, 8548, 9860, 10685, 21370, 36329, 42740, 61973, 72658, 123946, 145316, 181645, 247892, 309865, 363290, 619730, 726580, 1053541, 1239460, 2107082, 4214164, 5267705, 10535410, 21070820]

約数ペア:

[(1, 21070820), (2, 10535410), (4, 5267705), (5, 4214164), (10, 2107082), (17, 1239460), (20, 1053541), (29, 726580), (34, 619730), (58, 363290), (68, 309865), (85, 247892), (116, 181645), (145, 145316), (170, 123946), (290, 72658), (340, 61973), (493, 42740), (580, 36329), (986, 21370), (1972, 10685), (2137, 9860), (2465, 8548), (4274, 4930)]