21780456691

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{179}}^1\times {\mathrm{307}}^1\times {\mathrm{1381}}^1$

素因数の和:1915

約数の個数: 32

約数和(自身を含む): 25743674880

約数和(自身を除く): 3963218189

約数列:

[1, 7, 41, 179, 287, 307, 1253, 1381, 2149, 7339, 9667, 12587, 51373, 54953, 56621, 88109, 247199, 384671, 396347, 423967, 1730393, 2253073, 2967769, 10135159, 15771511, 17382647, 70946113, 75890093, 121678529, 531230651, 3111493813, 21780456691]

約数ペア:

[(1, 21780456691), (7, 3111493813), (41, 531230651), (179, 121678529), (287, 75890093), (307, 70946113), (1253, 17382647), (1381, 15771511), (2149, 10135159), (7339, 2967769), (9667, 2253073), (12587, 1730393), (51373, 423967), (54953, 396347), (56621, 384671), (88109, 247199)]