21279140

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{167}}^1\times {\mathrm{277}}^1$

素因数の和:476

約数の個数: 48

約数和(自身を含む): 47077632

約数和(自身を除く): 25798492

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 167, 230, 277, 334, 460, 554, 668, 835, 1108, 1385, 1670, 2770, 3340, 3841, 5540, 6371, 7682, 12742, 15364, 19205, 25484, 31855, 38410, 46259, 63710, 76820, 92518, 127420, 185036, 231295, 462590, 925180, 1063957, 2127914, 4255828, 5319785, 10639570, 21279140]

約数ペア:

[(1, 21279140), (2, 10639570), (4, 5319785), (5, 4255828), (10, 2127914), (20, 1063957), (23, 925180), (46, 462590), (92, 231295), (115, 185036), (167, 127420), (230, 92518), (277, 76820), (334, 63710), (460, 46259), (554, 38410), (668, 31855), (835, 25484), (1108, 19205), (1385, 15364), (1670, 12742), (2770, 7682), (3340, 6371), (3841, 5540)]