81021780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{64303}}^1$

素因数の和:64325

約数の個数: 72

約数和(自身を含む): 280879872

約数和(自身を除く): 199858092

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, 64303, 128606, 192909, 257212, 321515, 385818, 450121, 578727, 643030, 771636, 900242, 964545, 1157454, 1286060, 1350363, 1800484, 1929090, 2250605, 2314908, 2700726, 2893635, 3858180, 4051089, 4501210, 5401452, 5787270, 6751815, 8102178, 9002420, 11574540, 13503630, 16204356, 20255445, 27007260, 40510890, 81021780]

約数ペア:

[(1, 81021780), (2, 40510890), (3, 27007260), (4, 20255445), (5, 16204356), (6, 13503630), (7, 11574540), (9, 9002420), (10, 8102178), (12, 6751815), (14, 5787270), (15, 5401452), (18, 4501210), (20, 4051089), (21, 3858180), (28, 2893635), (30, 2700726), (35, 2314908), (36, 2250605), (42, 1929090), (45, 1800484), (60, 1350363), (63, 1286060), (70, 1157454), (84, 964545), (90, 900242), (105, 771636), (126, 643030), (140, 578727), (180, 450121), (210, 385818), (252, 321515), (315, 257212), (420, 192909), (630, 128606), (1260, 64303)]