21025360

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2953}}^1$

素因数の和:3055

約数の個数: 40

約数和(自身を含む): 49449960

約数和(自身を除く): 28424600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2953, 3560, 5906, 7120, 11812, 14765, 23624, 29530, 47248, 59060, 118120, 236240, 262817, 525634, 1051268, 1314085, 2102536, 2628170, 4205072, 5256340, 10512680, 21025360]

約数ペア:

[(1, 21025360), (2, 10512680), (4, 5256340), (5, 4205072), (8, 2628170), (10, 2102536), (16, 1314085), (20, 1051268), (40, 525634), (80, 262817), (89, 236240), (178, 118120), (356, 59060), (445, 47248), (712, 29530), (890, 23624), (1424, 14765), (1780, 11812), (2953, 7120), (3560, 5906)]