218215540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{2851}}^1$

素因数の和:2992

約数の個数: 48

約数和(自身を含む): 474344640

約数和(自身を除く): 256129100

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 89, 172, 178, 215, 356, 430, 445, 860, 890, 1780, 2851, 3827, 5702, 7654, 11404, 14255, 15308, 19135, 28510, 38270, 57020, 76540, 122593, 245186, 253739, 490372, 507478, 612965, 1014956, 1225930, 1268695, 2451860, 2537390, 5074780, 10910777, 21821554, 43643108, 54553885, 109107770, 218215540]

約数ペア:

[(1, 218215540), (2, 109107770), (4, 54553885), (5, 43643108), (10, 21821554), (20, 10910777), (43, 5074780), (86, 2537390), (89, 2451860), (172, 1268695), (178, 1225930), (215, 1014956), (356, 612965), (430, 507478), (445, 490372), (860, 253739), (890, 245186), (1780, 122593), (2851, 76540), (3827, 57020), (5702, 38270), (7654, 28510), (11404, 19135), (14255, 15308)]