19380140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{569}}^1$

素因数の和:722

約数の個数: 48

約数和(自身を含む): 44241120

約数和(自身を除く): 24860980

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 131, 260, 262, 524, 569, 655, 1138, 1310, 1703, 2276, 2620, 2845, 3406, 5690, 6812, 7397, 8515, 11380, 14794, 17030, 29588, 34060, 36985, 73970, 74539, 147940, 149078, 298156, 372695, 745390, 969007, 1490780, 1938014, 3876028, 4845035, 9690070, 19380140]

約数ペア:

[(1, 19380140), (2, 9690070), (4, 4845035), (5, 3876028), (10, 1938014), (13, 1490780), (20, 969007), (26, 745390), (52, 372695), (65, 298156), (130, 149078), (131, 147940), (260, 74539), (262, 73970), (524, 36985), (569, 34060), (655, 29588), (1138, 17030), (1310, 14794), (1703, 11380), (2276, 8515), (2620, 7397), (2845, 6812), (3406, 5690)]