213720820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{5651}}^1$

素因数の和:5752

約数の個数: 48

約数和(自身を含む): 470969856

約数和(自身を除く): 257249036

約数列:

[1, 2, 4, 5, 10, 20, 31, 61, 62, 122, 124, 155, 244, 305, 310, 610, 620, 1220, 1891, 3782, 5651, 7564, 9455, 11302, 18910, 22604, 28255, 37820, 56510, 113020, 175181, 344711, 350362, 689422, 700724, 875905, 1378844, 1723555, 1751810, 3447110, 3503620, 6894220, 10686041, 21372082, 42744164, 53430205, 106860410, 213720820]

約数ペア:

[(1, 213720820), (2, 106860410), (4, 53430205), (5, 42744164), (10, 21372082), (20, 10686041), (31, 6894220), (61, 3503620), (62, 3447110), (122, 1751810), (124, 1723555), (155, 1378844), (244, 875905), (305, 700724), (310, 689422), (610, 350362), (620, 344711), (1220, 175181), (1891, 113020), (3782, 56510), (5651, 37820), (7564, 28255), (9455, 22604), (11302, 18910)]