20691993

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{557}}^1$

素因数の和:657

約数の個数: 32

約数和(自身を含む): 33212160

約数和(自身を除く): 12520167

約数列:

[1, 3, 7, 21, 29, 61, 87, 183, 203, 427, 557, 609, 1281, 1671, 1769, 3899, 5307, 11697, 12383, 16153, 33977, 37149, 48459, 101931, 113071, 237839, 339213, 713517, 985333, 2955999, 6897331, 20691993]

約数ペア:

[(1, 20691993), (3, 6897331), (7, 2955999), (21, 985333), (29, 713517), (61, 339213), (87, 237839), (183, 113071), (203, 101931), (427, 48459), (557, 37149), (609, 33977), (1281, 16153), (1671, 12383), (1769, 11697), (3899, 5307)]