21147735

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:208

約数の個数: 64

約数和(自身を含む): 40919040

約数和(自身を除く): 19771305

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 73, 89, 93, 105, 155, 217, 219, 267, 365, 445, 465, 511, 623, 651, 1085, 1095, 1335, 1533, 1869, 2263, 2555, 2759, 3115, 3255, 6497, 6789, 7665, 8277, 9345, 11315, 13795, 15841, 19313, 19491, 32485, 33945, 41385, 45479, 47523, 57939, 79205, 96565, 97455, 136437, 201407, 227395, 237615, 289695, 604221, 682185, 1007035, 1409849, 3021105, 4229547, 7049245, 21147735]

約数ペア:

[(1, 21147735), (3, 7049245), (5, 4229547), (7, 3021105), (15, 1409849), (21, 1007035), (31, 682185), (35, 604221), (73, 289695), (89, 237615), (93, 227395), (105, 201407), (155, 136437), (217, 97455), (219, 96565), (267, 79205), (365, 57939), (445, 47523), (465, 45479), (511, 41385), (623, 33945), (651, 32485), (1085, 19491), (1095, 19313), (1335, 15841), (1533, 13795), (1869, 11315), (2263, 9345), (2555, 8277), (2759, 7665), (3115, 6789), (3255, 6497)]