64727920

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{9091}}^1$

素因数の和:9193

約数の個数: 40

約数和(自身を含む): 152200080

約数和(自身を除く): 87472160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560, 7120, 9091, 18182, 36364, 45455, 72728, 90910, 145456, 181820, 363640, 727280, 809099, 1618198, 3236396, 4045495, 6472792, 8090990, 12945584, 16181980, 32363960, 64727920]

約数ペア:

[(1, 64727920), (2, 32363960), (4, 16181980), (5, 12945584), (8, 8090990), (10, 6472792), (16, 4045495), (20, 3236396), (40, 1618198), (80, 809099), (89, 727280), (178, 363640), (356, 181820), (445, 145456), (712, 90910), (890, 72728), (1424, 45455), (1780, 36364), (3560, 18182), (7120, 9091)]