19995885

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{257}}^1$

素因数の和:307

約数の個数: 96

約数和(自身を含む): 45077760

約数和(自身を除く): 25081875

約数列:

[1, 3, 5, 7, 9, 13, 15, 19, 21, 35, 39, 45, 57, 63, 65, 91, 95, 105, 117, 133, 171, 195, 247, 257, 273, 285, 315, 399, 455, 585, 665, 741, 771, 819, 855, 1197, 1235, 1285, 1365, 1729, 1799, 1995, 2223, 2313, 3341, 3705, 3855, 4095, 4883, 5187, 5397, 5985, 8645, 8995, 10023, 11115, 11565, 14649, 15561, 16191, 16705, 23387, 24415, 25935, 26985, 30069, 34181, 43947, 50115, 63479, 70161, 73245, 77805, 80955, 102543, 116935, 150345, 170905, 190437, 210483, 219735, 307629, 317395, 350805, 444353, 512715, 571311, 952185, 1052415, 1333059, 1538145, 2221765, 2856555, 3999177, 6665295, 19995885]

約数ペア:

[(1, 19995885), (3, 6665295), (5, 3999177), (7, 2856555), (9, 2221765), (13, 1538145), (15, 1333059), (19, 1052415), (21, 952185), (35, 571311), (39, 512715), (45, 444353), (57, 350805), (63, 317395), (65, 307629), (91, 219735), (95, 210483), (105, 190437), (117, 170905), (133, 150345), (171, 116935), (195, 102543), (247, 80955), (257, 77805), (273, 73245), (285, 70161), (315, 63479), (399, 50115), (455, 43947), (585, 34181), (665, 30069), (741, 26985), (771, 25935), (819, 24415), (855, 23387), (1197, 16705), (1235, 16191), (1285, 15561), (1365, 14649), (1729, 11565), (1799, 11115), (1995, 10023), (2223, 8995), (2313, 8645), (3341, 5985), (3705, 5397), (3855, 5187), (4095, 4883)]