491291255

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{571}}^1$

素因数の和:688

約数の個数: 64

約数和(自身を含む): 762617856

約数和(自身を除く): 271326601

約数列:

[1, 5, 7, 13, 31, 35, 61, 65, 91, 155, 217, 305, 403, 427, 455, 571, 793, 1085, 1891, 2015, 2135, 2821, 2855, 3965, 3997, 5551, 7423, 9455, 13237, 14105, 17701, 19985, 24583, 27755, 34831, 37115, 51961, 66185, 88505, 122915, 123907, 172081, 174155, 230113, 243817, 259805, 452803, 619535, 860405, 1079761, 1150565, 1219085, 1610791, 2264015, 3169621, 5398805, 7558327, 8053955, 14036893, 15848105, 37791635, 70184465, 98258251, 491291255]

約数ペア:

[(1, 491291255), (5, 98258251), (7, 70184465), (13, 37791635), (31, 15848105), (35, 14036893), (61, 8053955), (65, 7558327), (91, 5398805), (155, 3169621), (217, 2264015), (305, 1610791), (403, 1219085), (427, 1150565), (455, 1079761), (571, 860405), (793, 619535), (1085, 452803), (1891, 259805), (2015, 243817), (2135, 230113), (2821, 174155), (2855, 172081), (3965, 123907), (3997, 122915), (5551, 88505), (7423, 66185), (9455, 51961), (13237, 37115), (14105, 34831), (17701, 27755), (19985, 24583)]