21297420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{661}}^1$

素因数の和:855

約数の個数: 72

約数和(自身を含む): 65061360

約数和(自身を除く): 43763940

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 179, 180, 358, 537, 661, 716, 895, 1074, 1322, 1611, 1790, 1983, 2148, 2644, 2685, 3222, 3305, 3580, 3966, 5370, 5949, 6444, 6610, 7932, 8055, 9915, 10740, 11898, 13220, 16110, 19830, 23796, 29745, 32220, 39660, 59490, 118319, 118980, 236638, 354957, 473276, 591595, 709914, 1064871, 1183190, 1419828, 1774785, 2129742, 2366380, 3549570, 4259484, 5324355, 7099140, 10648710, 21297420]

約数ペア:

[(1, 21297420), (2, 10648710), (3, 7099140), (4, 5324355), (5, 4259484), (6, 3549570), (9, 2366380), (10, 2129742), (12, 1774785), (15, 1419828), (18, 1183190), (20, 1064871), (30, 709914), (36, 591595), (45, 473276), (60, 354957), (90, 236638), (179, 118980), (180, 118319), (358, 59490), (537, 39660), (661, 32220), (716, 29745), (895, 23796), (1074, 19830), (1322, 16110), (1611, 13220), (1790, 11898), (1983, 10740), (2148, 9915), (2644, 8055), (2685, 7932), (3222, 6610), (3305, 6444), (3580, 5949), (3966, 5370)]