81661580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{4079}}^1$

素因数の和:4119

約数の個数: 96

約数和(自身を含む): 230307840

約数和(自身を除く): 148646260

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 91, 110, 130, 140, 143, 154, 182, 220, 260, 286, 308, 364, 385, 455, 572, 715, 770, 910, 1001, 1430, 1540, 1820, 2002, 2860, 4004, 4079, 5005, 8158, 10010, 16316, 20020, 20395, 28553, 40790, 44869, 53027, 57106, 81580, 89738, 106054, 114212, 142765, 179476, 212108, 224345, 265135, 285530, 314083, 371189, 448690, 530270, 571060, 583297, 628166, 742378, 897380, 1060540, 1166594, 1256332, 1484756, 1570415, 1855945, 2333188, 2916485, 3140830, 3711890, 4083079, 5832970, 6281660, 7423780, 8166158, 11665940, 16332316, 20415395, 40830790, 81661580]

約数ペア:

[(1, 81661580), (2, 40830790), (4, 20415395), (5, 16332316), (7, 11665940), (10, 8166158), (11, 7423780), (13, 6281660), (14, 5832970), (20, 4083079), (22, 3711890), (26, 3140830), (28, 2916485), (35, 2333188), (44, 1855945), (52, 1570415), (55, 1484756), (65, 1256332), (70, 1166594), (77, 1060540), (91, 897380), (110, 742378), (130, 628166), (140, 583297), (143, 571060), (154, 530270), (182, 448690), (220, 371189), (260, 314083), (286, 285530), (308, 265135), (364, 224345), (385, 212108), (455, 179476), (572, 142765), (715, 114212), (770, 106054), (910, 89738), (1001, 81580), (1430, 57106), (1540, 53027), (1820, 44869), (2002, 40790), (2860, 28553), (4004, 20395), (4079, 20020), (5005, 16316), (8158, 10010)]