21891940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{156371}}^1$

素因数の和:156387

約数の個数: 24

約数和(自身を含む): 52540992

約数和(自身を除く): 30649052

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 156371, 312742, 625484, 781855, 1094597, 1563710, 2189194, 3127420, 4378388, 5472985, 10945970, 21891940]

約数ペア:

[(1, 21891940), (2, 10945970), (4, 5472985), (5, 4378388), (7, 3127420), (10, 2189194), (14, 1563710), (20, 1094597), (28, 781855), (35, 625484), (70, 312742), (140, 156371)]