81336780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{64553}}^1$

素因数の和:64575

約数の個数: 72

約数和(自身を含む): 281971872

約数和(自身を除く): 200635092

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 64553, 129106, 193659, 258212, 322765, 387318, 451871, 580977, 645530, 774636, 903742, 968295, 1161954, 1291060, 1355613, 1807484, 1936590, 2259355, 2323908, 2711226, 2904885, 3873180, 4066839, 4518710, 5422452, 5809770, 6778065, 8133678, 9037420, 11619540, 13556130, 16267356, 20334195, 27112260, 40668390, 81336780]

約数ペア:

[(1, 81336780), (2, 40668390), (3, 27112260), (4, 20334195), (5, 16267356), (6, 13556130), (7, 11619540), (9, 9037420), (10, 8133678), (12, 6778065), (14, 5809770), (15, 5422452), (18, 4518710), (20, 4066839), (21, 3873180), (28, 2904885), (30, 2711226), (35, 2323908), (36, 2259355), (42, 1936590), (45, 1807484), (60, 1355613), (63, 1291060), (70, 1161954), (84, 968295), (90, 903742), (105, 774636), (126, 645530), (140, 580977), (180, 451871), (210, 387318), (252, 322765), (315, 258212), (420, 193659), (630, 129106), (1260, 64553)]