19984980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{839}}^1$

素因数の和:1248

約数の個数: 48

約数和(自身を含む): 56165760

約数和(自身を除く): 36180780

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 397, 794, 839, 1191, 1588, 1678, 1985, 2382, 2517, 3356, 3970, 4195, 4764, 5034, 5955, 7940, 8390, 10068, 11910, 12585, 16780, 23820, 25170, 50340, 333083, 666166, 999249, 1332332, 1665415, 1998498, 3330830, 3996996, 4996245, 6661660, 9992490, 19984980]

約数ペア:

[(1, 19984980), (2, 9992490), (3, 6661660), (4, 4996245), (5, 3996996), (6, 3330830), (10, 1998498), (12, 1665415), (15, 1332332), (20, 999249), (30, 666166), (60, 333083), (397, 50340), (794, 25170), (839, 23820), (1191, 16780), (1588, 12585), (1678, 11910), (1985, 10068), (2382, 8390), (2517, 7940), (3356, 5955), (3970, 5034), (4195, 4764)]