221155557

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{6449}}^1$

素因数の和:6553

約数の個数: 32

約数和(自身を含む): 356659200

約数和(自身を除く): 135503643

約数列:

[1, 3, 7, 21, 23, 69, 71, 161, 213, 483, 497, 1491, 1633, 4899, 6449, 11431, 19347, 34293, 45143, 135429, 148327, 444981, 457879, 1038289, 1373637, 3114867, 3205153, 9615459, 10531217, 31593651, 73718519, 221155557]

約数ペア:

[(1, 221155557), (3, 73718519), (7, 31593651), (21, 10531217), (23, 9615459), (69, 3205153), (71, 3114867), (161, 1373637), (213, 1038289), (483, 457879), (497, 444981), (1491, 148327), (1633, 135429), (4899, 45143), (6449, 34293), (11431, 19347)]