21755804

素因数分解:

$2^2\times 7^3\times {\mathrm{101}}^1\times {\mathrm{157}}^1$

素因数の和:283

約数の個数: 48

約数和(自身を含む): 45124800

約数和(自身を除く): 23368996

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 101, 157, 196, 202, 314, 343, 404, 628, 686, 707, 1099, 1372, 1414, 2198, 2828, 4396, 4949, 7693, 9898, 15386, 15857, 19796, 30772, 31714, 34643, 53851, 63428, 69286, 107702, 110999, 138572, 215404, 221998, 443996, 776993, 1553986, 3107972, 5438951, 10877902, 21755804]

約数ペア:

[(1, 21755804), (2, 10877902), (4, 5438951), (7, 3107972), (14, 1553986), (28, 776993), (49, 443996), (98, 221998), (101, 215404), (157, 138572), (196, 110999), (202, 107702), (314, 69286), (343, 63428), (404, 53851), (628, 34643), (686, 31714), (707, 30772), (1099, 19796), (1372, 15857), (1414, 15386), (2198, 9898), (2828, 7693), (4396, 4949)]