20871515

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:347

約数の個数: 32

約数和(自身を含む): 29942784

約数和(自身を除く): 9071269

約数列:

[1, 5, 7, 35, 37, 71, 185, 227, 259, 355, 497, 1135, 1295, 1589, 2485, 2627, 7945, 8399, 13135, 16117, 18389, 41995, 58793, 80585, 91945, 112819, 293965, 564095, 596329, 2981645, 4174303, 20871515]

約数ペア:

[(1, 20871515), (5, 4174303), (7, 2981645), (35, 596329), (37, 564095), (71, 293965), (185, 112819), (227, 91945), (259, 80585), (355, 58793), (497, 41995), (1135, 18389), (1295, 16117), (1589, 13135), (2485, 8399), (2627, 7945)]