21271495

素因数分解:

$5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{193}}^1$

素因数の和:319

約数の個数: 32

約数和(自身を含む): 30394368

約数和(自身を除く): 9122873

約数列:

[1, 5, 7, 35, 47, 67, 193, 235, 329, 335, 469, 965, 1351, 1645, 2345, 3149, 6755, 9071, 12931, 15745, 22043, 45355, 63497, 64655, 90517, 110215, 317485, 452585, 607757, 3038785, 4254299, 21271495]

約数ペア:

[(1, 21271495), (5, 4254299), (7, 3038785), (35, 607757), (47, 452585), (67, 317485), (193, 110215), (235, 90517), (329, 64655), (335, 63497), (469, 45355), (965, 22043), (1351, 15745), (1645, 12931), (2345, 9071), (3149, 6755)]