18945820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{541}}^1$

素因数の和:670

約数の個数: 48

約数和(自身を含む): 42614208

約数和(自身を除く): 23668388

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 103, 170, 206, 340, 412, 515, 541, 1030, 1082, 1751, 2060, 2164, 2705, 3502, 5410, 7004, 8755, 9197, 10820, 17510, 18394, 35020, 36788, 45985, 55723, 91970, 111446, 183940, 222892, 278615, 557230, 947291, 1114460, 1894582, 3789164, 4736455, 9472910, 18945820]

約数ペア:

[(1, 18945820), (2, 9472910), (4, 4736455), (5, 3789164), (10, 1894582), (17, 1114460), (20, 947291), (34, 557230), (68, 278615), (85, 222892), (103, 183940), (170, 111446), (206, 91970), (340, 55723), (412, 45985), (515, 36788), (541, 35020), (1030, 18394), (1082, 17510), (1751, 10820), (2060, 9197), (2164, 8755), (2705, 7004), (3502, 5410)]