21881615

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{277}}^1$

素因数の和:387

約数の個数: 32

約数和(自身を含む): 31438464

約数和(自身を除く): 9556849

約数列:

[1, 5, 7, 35, 37, 61, 185, 259, 277, 305, 427, 1295, 1385, 1939, 2135, 2257, 9695, 10249, 11285, 15799, 16897, 51245, 71743, 78995, 84485, 118279, 358715, 591395, 625189, 3125945, 4376323, 21881615]

約数ペア:

[(1, 21881615), (5, 4376323), (7, 3125945), (35, 625189), (37, 591395), (61, 358715), (185, 118279), (259, 84485), (277, 78995), (305, 71743), (427, 51245), (1295, 16897), (1385, 15799), (1939, 11285), (2135, 10249), (2257, 9695)]