20517380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:165

約数の個数: 96

約数和(自身を含む): 50125824

約数和(自身を除く): 29608444

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 46, 47, 52, 65, 73, 92, 94, 115, 130, 146, 188, 230, 235, 260, 292, 299, 365, 460, 470, 598, 611, 730, 940, 949, 1081, 1196, 1222, 1460, 1495, 1679, 1898, 2162, 2444, 2990, 3055, 3358, 3431, 3796, 4324, 4745, 5405, 5980, 6110, 6716, 6862, 8395, 9490, 10810, 12220, 13724, 14053, 16790, 17155, 18980, 21620, 21827, 28106, 33580, 34310, 43654, 44603, 56212, 68620, 70265, 78913, 87308, 89206, 109135, 140530, 157826, 178412, 218270, 223015, 281060, 315652, 394565, 436540, 446030, 789130, 892060, 1025869, 1578260, 2051738, 4103476, 5129345, 10258690, 20517380]

約数ペア:

[(1, 20517380), (2, 10258690), (4, 5129345), (5, 4103476), (10, 2051738), (13, 1578260), (20, 1025869), (23, 892060), (26, 789130), (46, 446030), (47, 436540), (52, 394565), (65, 315652), (73, 281060), (92, 223015), (94, 218270), (115, 178412), (130, 157826), (146, 140530), (188, 109135), (230, 89206), (235, 87308), (260, 78913), (292, 70265), (299, 68620), (365, 56212), (460, 44603), (470, 43654), (598, 34310), (611, 33580), (730, 28106), (940, 21827), (949, 21620), (1081, 18980), (1196, 17155), (1222, 16790), (1460, 14053), (1495, 13724), (1679, 12220), (1898, 10810), (2162, 9490), (2444, 8395), (2990, 6862), (3055, 6716), (3358, 6110), (3431, 5980), (3796, 5405), (4324, 4745)]