80181780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{190909}}^1$

素因数の和:190928

約数の個数: 48

約数和(自身を含む): 256583040

約数和(自身を除く): 176401260

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 190909, 381818, 572727, 763636, 954545, 1145454, 1336363, 1909090, 2290908, 2672726, 2863635, 3818180, 4009089, 5345452, 5727270, 6681815, 8018178, 11454540, 13363630, 16036356, 20045445, 26727260, 40090890, 80181780]

約数ペア:

[(1, 80181780), (2, 40090890), (3, 26727260), (4, 20045445), (5, 16036356), (6, 13363630), (7, 11454540), (10, 8018178), (12, 6681815), (14, 5727270), (15, 5345452), (20, 4009089), (21, 3818180), (28, 2863635), (30, 2672726), (35, 2290908), (42, 1909090), (60, 1336363), (70, 1145454), (84, 954545), (105, 763636), (140, 572727), (210, 381818), (420, 190909)]