21694040

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{523}}^1$

素因数の和:612

約数の個数: 64

約数和(自身を含む): 52630560

約数和(自身を除く): 30936520

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 61, 68, 85, 122, 136, 170, 244, 305, 340, 488, 523, 610, 680, 1037, 1046, 1220, 2074, 2092, 2440, 2615, 4148, 4184, 5185, 5230, 8296, 8891, 10370, 10460, 17782, 20740, 20920, 31903, 35564, 41480, 44455, 63806, 71128, 88910, 127612, 159515, 177820, 255224, 319030, 355640, 542351, 638060, 1084702, 1276120, 2169404, 2711755, 4338808, 5423510, 10847020, 21694040]

約数ペア:

[(1, 21694040), (2, 10847020), (4, 5423510), (5, 4338808), (8, 2711755), (10, 2169404), (17, 1276120), (20, 1084702), (34, 638060), (40, 542351), (61, 355640), (68, 319030), (85, 255224), (122, 177820), (136, 159515), (170, 127612), (244, 88910), (305, 71128), (340, 63806), (488, 44455), (523, 41480), (610, 35564), (680, 31903), (1037, 20920), (1046, 20740), (1220, 17782), (2074, 10460), (2092, 10370), (2440, 8891), (2615, 8296), (4148, 5230), (4184, 5185)]