21083140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{619}}^1$

素因数の和:772

約数の個数: 48

約数和(自身を含む): 48121920

約数和(自身を除く): 27038780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 131, 260, 262, 524, 619, 655, 1238, 1310, 1703, 2476, 2620, 3095, 3406, 6190, 6812, 8047, 8515, 12380, 16094, 17030, 32188, 34060, 40235, 80470, 81089, 160940, 162178, 324356, 405445, 810890, 1054157, 1621780, 2108314, 4216628, 5270785, 10541570, 21083140]

約数ペア:

[(1, 21083140), (2, 10541570), (4, 5270785), (5, 4216628), (10, 2108314), (13, 1621780), (20, 1054157), (26, 810890), (52, 405445), (65, 324356), (130, 162178), (131, 160940), (260, 81089), (262, 80470), (524, 40235), (619, 34060), (655, 32188), (1238, 17030), (1310, 16094), (1703, 12380), (2476, 8515), (2620, 8047), (3095, 6812), (3406, 6190)]