1780220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{167}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 4148928

約数和(自身を除く): 2368708

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 41, 52, 65, 82, 130, 164, 167, 205, 260, 334, 410, 533, 668, 820, 835, 1066, 1670, 2132, 2171, 2665, 3340, 4342, 5330, 6847, 8684, 10660, 10855, 13694, 21710, 27388, 34235, 43420, 68470, 89011, 136940, 178022, 356044, 445055, 890110, 1780220]

約数ペア:

[(1, 1780220), (2, 890110), (4, 445055), (5, 356044), (10, 178022), (13, 136940), (20, 89011), (26, 68470), (41, 43420), (52, 34235), (65, 27388), (82, 21710), (130, 13694), (164, 10855), (167, 10660), (205, 8684), (260, 6847), (334, 5330), (410, 4342), (533, 3340), (668, 2665), (820, 2171), (835, 2132), (1066, 1670)]