12500020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{367}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 28562688

約数和(自身を除く): 16062668

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 131, 260, 262, 367, 524, 655, 734, 1310, 1468, 1703, 1835, 2620, 3406, 3670, 4771, 6812, 7340, 8515, 9542, 17030, 19084, 23855, 34060, 47710, 48077, 95420, 96154, 192308, 240385, 480770, 625001, 961540, 1250002, 2500004, 3125005, 6250010, 12500020]

約数ペア:

[(1, 12500020), (2, 6250010), (4, 3125005), (5, 2500004), (10, 1250002), (13, 961540), (20, 625001), (26, 480770), (52, 240385), (65, 192308), (130, 96154), (131, 95420), (260, 48077), (262, 47710), (367, 34060), (524, 23855), (655, 19084), (734, 17030), (1310, 9542), (1468, 8515), (1703, 7340), (1835, 6812), (2620, 4771), (3406, 3670)]