80101780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{4091}}^1$

素因数の和:4200

約数の個数: 48

約数和(自身を含む): 185613120

約数和(自身を除く): 105511340

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 890, 979, 1780, 1958, 3916, 4091, 4895, 8182, 9790, 16364, 19580, 20455, 40910, 45001, 81820, 90002, 180004, 225005, 364099, 450010, 728198, 900020, 1456396, 1820495, 3640990, 4005089, 7281980, 8010178, 16020356, 20025445, 40050890, 80101780]

約数ペア:

[(1, 80101780), (2, 40050890), (4, 20025445), (5, 16020356), (10, 8010178), (11, 7281980), (20, 4005089), (22, 3640990), (44, 1820495), (55, 1456396), (89, 900020), (110, 728198), (178, 450010), (220, 364099), (356, 225005), (445, 180004), (890, 90002), (979, 81820), (1780, 45001), (1958, 40910), (3916, 20455), (4091, 19580), (4895, 16364), (8182, 9790)]