499402020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{640259}}^1$

素因数の和:640284

約数の個数: 48

約数和(自身を含む): 1505891520

約数和(自身を除く): 1006489500

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 640259, 1280518, 1920777, 2561036, 3201295, 3841554, 6402590, 7683108, 8323367, 9603885, 12805180, 16646734, 19207770, 24970101, 33293468, 38415540, 41616835, 49940202, 83233670, 99880404, 124850505, 166467340, 249701010, 499402020]

約数ペア:

[(1, 499402020), (2, 249701010), (3, 166467340), (4, 124850505), (5, 99880404), (6, 83233670), (10, 49940202), (12, 41616835), (13, 38415540), (15, 33293468), (20, 24970101), (26, 19207770), (30, 16646734), (39, 12805180), (52, 9603885), (60, 8323367), (65, 7683108), (78, 6402590), (130, 3841554), (156, 3201295), (195, 2561036), (260, 1920777), (390, 1280518), (780, 640259)]