21397460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{152839}}^1$

素因数の和:152855

約数の個数: 24

約数和(自身を含む): 51354240

約数和(自身を除く): 29956780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 152839, 305678, 611356, 764195, 1069873, 1528390, 2139746, 3056780, 4279492, 5349365, 10698730, 21397460]

約数ペア:

[(1, 21397460), (2, 10698730), (4, 5349365), (5, 4279492), (7, 3056780), (10, 2139746), (14, 1528390), (20, 1069873), (28, 764195), (35, 611356), (70, 305678), (140, 152839)]