18746980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{359}}^1\times {\mathrm{373}}^1$

素因数の和:748

約数の個数: 48

約数和(自身を含む): 45239040

約数和(自身を除く): 26492060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 359, 373, 718, 746, 1436, 1492, 1795, 1865, 2513, 2611, 3590, 3730, 5026, 5222, 7180, 7460, 10052, 10444, 12565, 13055, 25130, 26110, 50260, 52220, 133907, 267814, 535628, 669535, 937349, 1339070, 1874698, 2678140, 3749396, 4686745, 9373490, 18746980]

約数ペア:

[(1, 18746980), (2, 9373490), (4, 4686745), (5, 3749396), (7, 2678140), (10, 1874698), (14, 1339070), (20, 937349), (28, 669535), (35, 535628), (70, 267814), (140, 133907), (359, 52220), (373, 50260), (718, 26110), (746, 25130), (1436, 13055), (1492, 12565), (1795, 10444), (1865, 10052), (2513, 7460), (2611, 7180), (3590, 5222), (3730, 5026)]