217415745

素因数分解:

$3^5\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1409}}^1$

素因数の和:1556

約数の個数: 48

約数和(自身を含む): 394168320

約数和(自身を除く): 176752575

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 127, 135, 243, 381, 405, 635, 1143, 1215, 1409, 1905, 3429, 4227, 5715, 7045, 10287, 12681, 17145, 21135, 30861, 38043, 51435, 63405, 114129, 154305, 178943, 190215, 342387, 536829, 570645, 894715, 1610487, 1711935, 2684145, 4831461, 8052435, 14494383, 24157305, 43483149, 72471915, 217415745]

約数ペア:

[(1, 217415745), (3, 72471915), (5, 43483149), (9, 24157305), (15, 14494383), (27, 8052435), (45, 4831461), (81, 2684145), (127, 1711935), (135, 1610487), (243, 894715), (381, 570645), (405, 536829), (635, 342387), (1143, 190215), (1215, 178943), (1409, 154305), (1905, 114129), (3429, 63405), (4227, 51435), (5715, 38043), (7045, 30861), (10287, 21135), (12681, 17145)]