21761120

素因数分解:

$2^5\times 5^1\times {\mathrm{277}}^1\times {\mathrm{491}}^1$

素因数の和:783

約数の個数: 48

約数和(自身を含む): 51701328

約数和(自身を除く): 29940208

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 277, 491, 554, 982, 1108, 1385, 1964, 2216, 2455, 2770, 3928, 4432, 4910, 5540, 7856, 8864, 9820, 11080, 15712, 19640, 22160, 39280, 44320, 78560, 136007, 272014, 544028, 680035, 1088056, 1360070, 2176112, 2720140, 4352224, 5440280, 10880560, 21761120]

約数ペア:

[(1, 21761120), (2, 10880560), (4, 5440280), (5, 4352224), (8, 2720140), (10, 2176112), (16, 1360070), (20, 1088056), (32, 680035), (40, 544028), (80, 272014), (160, 136007), (277, 78560), (491, 44320), (554, 39280), (982, 22160), (1108, 19640), (1385, 15712), (1964, 11080), (2216, 9820), (2455, 8864), (2770, 7856), (3928, 5540), (4432, 4910)]