28440980

素因数分解:

$2^2\times 5^1\times {\mathrm{673}}^1\times {\mathrm{2113}}^1$

素因数の和:2795

約数の個数: 24

約数和(自身を含む): 59843112

約数和(自身を除く): 31402132

約数列:

[1, 2, 4, 5, 10, 20, 673, 1346, 2113, 2692, 3365, 4226, 6730, 8452, 10565, 13460, 21130, 42260, 1422049, 2844098, 5688196, 7110245, 14220490, 28440980]

約数ペア:

[(1, 28440980), (2, 14220490), (4, 7110245), (5, 5688196), (10, 2844098), (20, 1422049), (673, 42260), (1346, 21130), (2113, 13460), (2692, 10565), (3365, 8452), (4226, 6730)]