21223260

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{751}}^1$

素因数の和:923

約数の個数: 72

約数和(自身を含む): 64873536

約数和(自身を除く): 43650276

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 157, 180, 314, 471, 628, 751, 785, 942, 1413, 1502, 1570, 1884, 2253, 2355, 2826, 3004, 3140, 3755, 4506, 4710, 5652, 6759, 7065, 7510, 9012, 9420, 11265, 13518, 14130, 15020, 22530, 27036, 28260, 33795, 45060, 67590, 117907, 135180, 235814, 353721, 471628, 589535, 707442, 1061163, 1179070, 1414884, 1768605, 2122326, 2358140, 3537210, 4244652, 5305815, 7074420, 10611630, 21223260]

約数ペア:

[(1, 21223260), (2, 10611630), (3, 7074420), (4, 5305815), (5, 4244652), (6, 3537210), (9, 2358140), (10, 2122326), (12, 1768605), (15, 1414884), (18, 1179070), (20, 1061163), (30, 707442), (36, 589535), (45, 471628), (60, 353721), (90, 235814), (157, 135180), (180, 117907), (314, 67590), (471, 45060), (628, 33795), (751, 28260), (785, 27036), (942, 22530), (1413, 15020), (1502, 14130), (1570, 13518), (1884, 11265), (2253, 9420), (2355, 9012), (2826, 7510), (3004, 7065), (3140, 6759), (3755, 5652), (4506, 4710)]