16620820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{191}}^1\times {\mathrm{229}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 37094400

約数和(自身を除く): 20473580

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 191, 229, 380, 382, 458, 764, 916, 955, 1145, 1910, 2290, 3629, 3820, 4351, 4580, 7258, 8702, 14516, 17404, 18145, 21755, 36290, 43510, 43739, 72580, 87020, 87478, 174956, 218695, 437390, 831041, 874780, 1662082, 3324164, 4155205, 8310410, 16620820]

約数ペア:

[(1, 16620820), (2, 8310410), (4, 4155205), (5, 3324164), (10, 1662082), (19, 874780), (20, 831041), (38, 437390), (76, 218695), (95, 174956), (190, 87478), (191, 87020), (229, 72580), (380, 43739), (382, 43510), (458, 36290), (764, 21755), (916, 18145), (955, 17404), (1145, 14516), (1910, 8702), (2290, 7258), (3629, 4580), (3820, 4351)]