20855120

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1823}}^1$

素因数の和:1860

約数の個数: 80

約数和(自身を含む): 56996352

約数和(自身を除く): 36141232

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 40, 44, 52, 55, 65, 80, 88, 104, 110, 130, 143, 176, 208, 220, 260, 286, 440, 520, 572, 715, 880, 1040, 1144, 1430, 1823, 2288, 2860, 3646, 5720, 7292, 9115, 11440, 14584, 18230, 20053, 23699, 29168, 36460, 40106, 47398, 72920, 80212, 94796, 100265, 118495, 145840, 160424, 189592, 200530, 236990, 260689, 320848, 379184, 401060, 473980, 521378, 802120, 947960, 1042756, 1303445, 1604240, 1895920, 2085512, 2606890, 4171024, 5213780, 10427560, 20855120]

約数ペア:

[(1, 20855120), (2, 10427560), (4, 5213780), (5, 4171024), (8, 2606890), (10, 2085512), (11, 1895920), (13, 1604240), (16, 1303445), (20, 1042756), (22, 947960), (26, 802120), (40, 521378), (44, 473980), (52, 401060), (55, 379184), (65, 320848), (80, 260689), (88, 236990), (104, 200530), (110, 189592), (130, 160424), (143, 145840), (176, 118495), (208, 100265), (220, 94796), (260, 80212), (286, 72920), (440, 47398), (520, 40106), (572, 36460), (715, 29168), (880, 23699), (1040, 20053), (1144, 18230), (1430, 14584), (1823, 11440), (2288, 9115), (2860, 7292), (3646, 5720)]