20925870

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{397}}^1$

素因数の和:665

約数の個数: 64

約数和(自身を含む): 57770496

約数和(自身を除く): 36844626

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210, 251, 397, 502, 753, 794, 1191, 1255, 1506, 1757, 1985, 2382, 2510, 2779, 3514, 3765, 3970, 5271, 5558, 5955, 7530, 8337, 8785, 10542, 11910, 13895, 16674, 17570, 26355, 27790, 41685, 52710, 83370, 99647, 199294, 298941, 498235, 597882, 697529, 996470, 1395058, 1494705, 2092587, 2989410, 3487645, 4185174, 6975290, 10462935, 20925870]

約数ペア:

[(1, 20925870), (2, 10462935), (3, 6975290), (5, 4185174), (6, 3487645), (7, 2989410), (10, 2092587), (14, 1494705), (15, 1395058), (21, 996470), (30, 697529), (35, 597882), (42, 498235), (70, 298941), (105, 199294), (210, 99647), (251, 83370), (397, 52710), (502, 41685), (753, 27790), (794, 26355), (1191, 17570), (1255, 16674), (1506, 13895), (1757, 11910), (1985, 10542), (2382, 8785), (2510, 8337), (2779, 7530), (3514, 5955), (3765, 5558), (3970, 5271)]