20381480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{877}}^1$

素因数の和:978

約数の個数: 64

約数和(自身を含む): 53101440

約数和(自身を除く): 32719960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 83, 140, 166, 280, 332, 415, 581, 664, 830, 877, 1162, 1660, 1754, 2324, 2905, 3320, 3508, 4385, 4648, 5810, 6139, 7016, 8770, 11620, 12278, 17540, 23240, 24556, 30695, 35080, 49112, 61390, 72791, 122780, 145582, 245560, 291164, 363955, 509537, 582328, 727910, 1019074, 1455820, 2038148, 2547685, 2911640, 4076296, 5095370, 10190740, 20381480]

約数ペア:

[(1, 20381480), (2, 10190740), (4, 5095370), (5, 4076296), (7, 2911640), (8, 2547685), (10, 2038148), (14, 1455820), (20, 1019074), (28, 727910), (35, 582328), (40, 509537), (56, 363955), (70, 291164), (83, 245560), (140, 145582), (166, 122780), (280, 72791), (332, 61390), (415, 49112), (581, 35080), (664, 30695), (830, 24556), (877, 23240), (1162, 17540), (1660, 12278), (1754, 11620), (2324, 8770), (2905, 7016), (3320, 6139), (3508, 5810), (4385, 4648)]