19840040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{673}}^1$

素因数の和:762

約数の個数: 64

約数和(自身を含む): 49498560

約数和(自身を除く): 29658520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 67, 88, 110, 134, 220, 268, 335, 440, 536, 670, 673, 737, 1340, 1346, 1474, 2680, 2692, 2948, 3365, 3685, 5384, 5896, 6730, 7370, 7403, 13460, 14740, 14806, 26920, 29480, 29612, 37015, 45091, 59224, 74030, 90182, 148060, 180364, 225455, 296120, 360728, 450910, 496001, 901820, 992002, 1803640, 1984004, 2480005, 3968008, 4960010, 9920020, 19840040]

約数ペア:

[(1, 19840040), (2, 9920020), (4, 4960010), (5, 3968008), (8, 2480005), (10, 1984004), (11, 1803640), (20, 992002), (22, 901820), (40, 496001), (44, 450910), (55, 360728), (67, 296120), (88, 225455), (110, 180364), (134, 148060), (220, 90182), (268, 74030), (335, 59224), (440, 45091), (536, 37015), (670, 29612), (673, 29480), (737, 26920), (1340, 14806), (1346, 14740), (1474, 13460), (2680, 7403), (2692, 7370), (2948, 6730), (3365, 5896), (3685, 5384)]