18821788

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 36789984

約数和(自身を除く): 17968196

約数列:

[1, 2, 4, 17, 34, 41, 43, 68, 82, 86, 157, 164, 172, 314, 628, 697, 731, 1394, 1462, 1763, 2669, 2788, 2924, 3526, 5338, 6437, 6751, 7052, 10676, 12874, 13502, 25748, 27004, 29971, 59942, 109429, 114767, 119884, 218858, 229534, 276791, 437716, 459068, 553582, 1107164, 4705447, 9410894, 18821788]

約数ペア:

[(1, 18821788), (2, 9410894), (4, 4705447), (17, 1107164), (34, 553582), (41, 459068), (43, 437716), (68, 276791), (82, 229534), (86, 218858), (157, 119884), (164, 114767), (172, 109429), (314, 59942), (628, 29971), (697, 27004), (731, 25748), (1394, 13502), (1462, 12874), (1763, 10676), (2669, 7052), (2788, 6751), (2924, 6437), (3526, 5338)]