21435560

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{1619}}^1$

素因数の和:1961

約数の個数: 32

約数和(自身を含む): 48405600

約数和(自身を除く): 26970040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1619, 1655, 2648, 3238, 3310, 6476, 6620, 8095, 12952, 13240, 16190, 32380, 64760, 535889, 1071778, 2143556, 2679445, 4287112, 5358890, 10717780, 21435560]

約数ペア:

[(1, 21435560), (2, 10717780), (4, 5358890), (5, 4287112), (8, 2679445), (10, 2143556), (20, 1071778), (40, 535889), (331, 64760), (662, 32380), (1324, 16190), (1619, 13240), (1655, 12952), (2648, 8095), (3238, 6620), (3310, 6476)]