81320360

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{421}}^1\times {\mathrm{439}}^1$

素因数の和:882

約数の個数: 64

約数和(自身を含む): 200534400

約数和(自身を除く): 119214040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 421, 439, 440, 842, 878, 1684, 1756, 2105, 2195, 3368, 3512, 4210, 4390, 4631, 4829, 8420, 8780, 9262, 9658, 16840, 17560, 18524, 19316, 23155, 24145, 37048, 38632, 46310, 48290, 92620, 96580, 184819, 185240, 193160, 369638, 739276, 924095, 1478552, 1848190, 2033009, 3696380, 4066018, 7392760, 8132036, 10165045, 16264072, 20330090, 40660180, 81320360]

約数ペア:

[(1, 81320360), (2, 40660180), (4, 20330090), (5, 16264072), (8, 10165045), (10, 8132036), (11, 7392760), (20, 4066018), (22, 3696380), (40, 2033009), (44, 1848190), (55, 1478552), (88, 924095), (110, 739276), (220, 369638), (421, 193160), (439, 185240), (440, 184819), (842, 96580), (878, 92620), (1684, 48290), (1756, 46310), (2105, 38632), (2195, 37048), (3368, 24145), (3512, 23155), (4210, 19316), (4390, 18524), (4631, 17560), (4829, 16840), (8420, 9658), (8780, 9262)]