21693015

素因数分解:

$3^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{1847}}^1$

素因数の和:1893

約数の個数: 40

約数和(自身を含む): 40249440

約数和(自身を除く): 18556425

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 81, 87, 135, 145, 261, 405, 435, 783, 1305, 1847, 2349, 3915, 5541, 9235, 11745, 16623, 27705, 49869, 53563, 83115, 149607, 160689, 249345, 267815, 482067, 748035, 803445, 1446201, 2410335, 4338603, 7231005, 21693015]

約数ペア:

[(1, 21693015), (3, 7231005), (5, 4338603), (9, 2410335), (15, 1446201), (27, 803445), (29, 748035), (45, 482067), (81, 267815), (87, 249345), (135, 160689), (145, 149607), (261, 83115), (405, 53563), (435, 49869), (783, 27705), (1305, 16623), (1847, 11745), (2349, 9235), (3915, 5541)]