21715148

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^3\times {\mathrm{353}}^1$

素因数の和:403

約数の個数: 48

約数和(自身を含む): 47181120

約数和(自身を除く): 25465972

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 169, 182, 338, 353, 364, 676, 706, 1183, 1412, 2197, 2366, 2471, 4394, 4589, 4732, 4942, 8788, 9178, 9884, 15379, 18356, 30758, 32123, 59657, 61516, 64246, 119314, 128492, 238628, 417599, 775541, 835198, 1551082, 1670396, 3102164, 5428787, 10857574, 21715148]

約数ペア:

[(1, 21715148), (2, 10857574), (4, 5428787), (7, 3102164), (13, 1670396), (14, 1551082), (26, 835198), (28, 775541), (52, 417599), (91, 238628), (169, 128492), (182, 119314), (338, 64246), (353, 61516), (364, 59657), (676, 32123), (706, 30758), (1183, 18356), (1412, 15379), (2197, 9884), (2366, 9178), (2471, 8788), (4394, 4942), (4589, 4732)]