71287420

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{157}}^1\times {\mathrm{311}}^1$

素因数の和:550

約数の個数: 48

約数和(自身を含む): 153211968

約数和(自身を除く): 81924548

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 157, 292, 311, 314, 365, 622, 628, 730, 785, 1244, 1460, 1555, 1570, 3110, 3140, 6220, 11461, 22703, 22922, 45406, 45844, 48827, 57305, 90812, 97654, 113515, 114610, 195308, 227030, 229220, 244135, 454060, 488270, 976540, 3564371, 7128742, 14257484, 17821855, 35643710, 71287420]

約数ペア:

[(1, 71287420), (2, 35643710), (4, 17821855), (5, 14257484), (10, 7128742), (20, 3564371), (73, 976540), (146, 488270), (157, 454060), (292, 244135), (311, 229220), (314, 227030), (365, 195308), (622, 114610), (628, 113515), (730, 97654), (785, 90812), (1244, 57305), (1460, 48827), (1555, 45844), (1570, 45406), (3110, 22922), (3140, 22703), (6220, 11461)]