81246320

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11411}}^1$

素因数の和:11513

約数の個数: 40

約数和(自身を含む): 191036880

約数和(自身を除く): 109790560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560, 7120, 11411, 22822, 45644, 57055, 91288, 114110, 182576, 228220, 456440, 912880, 1015579, 2031158, 4062316, 5077895, 8124632, 10155790, 16249264, 20311580, 40623160, 81246320]

約数ペア:

[(1, 81246320), (2, 40623160), (4, 20311580), (5, 16249264), (8, 10155790), (10, 8124632), (16, 5077895), (20, 4062316), (40, 2031158), (80, 1015579), (89, 912880), (178, 456440), (356, 228220), (445, 182576), (712, 114110), (890, 91288), (1424, 57055), (1780, 45644), (3560, 22822), (7120, 11411)]