21871185

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{577}}^1$

素因数の和:630

約数の個数: 48

約数和(自身を含む): 42281856

約数和(自身を除く): 20410671

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 361, 399, 577, 665, 1083, 1731, 1805, 1995, 2527, 2885, 4039, 5415, 7581, 8655, 10963, 12117, 12635, 20195, 32889, 37905, 54815, 60585, 76741, 164445, 208297, 230223, 383705, 624891, 1041485, 1151115, 1458079, 3124455, 4374237, 7290395, 21871185]

約数ペア:

[(1, 21871185), (3, 7290395), (5, 4374237), (7, 3124455), (15, 1458079), (19, 1151115), (21, 1041485), (35, 624891), (57, 383705), (95, 230223), (105, 208297), (133, 164445), (285, 76741), (361, 60585), (399, 54815), (577, 37905), (665, 32889), (1083, 20195), (1731, 12635), (1805, 12117), (1995, 10963), (2527, 8655), (2885, 7581), (4039, 5415)]