620980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{509}}^1$

素因数の和:579

約数の個数: 24

約数和(自身を含む): 1328040

約数和(自身を除く): 707060

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 509, 610, 1018, 1220, 2036, 2545, 5090, 10180, 31049, 62098, 124196, 155245, 310490, 620980]

約数ペア:

[(1, 620980), (2, 310490), (4, 155245), (5, 124196), (10, 62098), (20, 31049), (61, 10180), (122, 5090), (244, 2545), (305, 2036), (509, 1220), (610, 1018)]