220178990

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{277}}^1\times {\mathrm{787}}^1$

素因数の和:1172

約数の個数: 32

約数和(自身を含む): 402201504

約数和(自身を除く): 182022514

約数列:

[1, 2, 5, 10, 101, 202, 277, 505, 554, 787, 1010, 1385, 1574, 2770, 3935, 7870, 27977, 55954, 79487, 139885, 158974, 217999, 279770, 397435, 435998, 794870, 1089995, 2179990, 22017899, 44035798, 110089495, 220178990]

約数ペア:

[(1, 220178990), (2, 110089495), (5, 44035798), (10, 22017899), (101, 2179990), (202, 1089995), (277, 794870), (505, 435998), (554, 397435), (787, 279770), (1010, 217999), (1385, 158974), (1574, 139885), (2770, 79487), (3935, 55954), (7870, 27977)]