21390360

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{449}}^1$

素因数の和:860

約数の個数: 64

約数和(自身を含む): 64476000

約数和(自身を除く): 43085640

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 397, 449, 794, 898, 1191, 1347, 1588, 1796, 1985, 2245, 2382, 2694, 3176, 3592, 3970, 4490, 4764, 5388, 5955, 6735, 7940, 8980, 9528, 10776, 11910, 13470, 15880, 17960, 23820, 26940, 47640, 53880, 178253, 356506, 534759, 713012, 891265, 1069518, 1426024, 1782530, 2139036, 2673795, 3565060, 4278072, 5347590, 7130120, 10695180, 21390360]

約数ペア:

[(1, 21390360), (2, 10695180), (3, 7130120), (4, 5347590), (5, 4278072), (6, 3565060), (8, 2673795), (10, 2139036), (12, 1782530), (15, 1426024), (20, 1069518), (24, 891265), (30, 713012), (40, 534759), (60, 356506), (120, 178253), (397, 53880), (449, 47640), (794, 26940), (898, 23820), (1191, 17960), (1347, 15880), (1588, 13470), (1796, 11910), (1985, 10776), (2245, 9528), (2382, 8980), (2694, 7940), (3176, 6735), (3592, 5955), (3970, 5388), (4490, 4764)]