21507276

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{463}}^1$

素因数の和:563

約数の個数: 72

約数和(自身を含む): 59243520

約数和(自身を除く): 37736244

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 79, 84, 98, 147, 158, 196, 237, 294, 316, 463, 474, 553, 588, 926, 948, 1106, 1389, 1659, 1852, 2212, 2778, 3241, 3318, 3871, 5556, 6482, 6636, 7742, 9723, 11613, 12964, 15484, 19446, 22687, 23226, 36577, 38892, 45374, 46452, 68061, 73154, 90748, 109731, 136122, 146308, 219462, 256039, 272244, 438924, 512078, 768117, 1024156, 1536234, 1792273, 3072468, 3584546, 5376819, 7169092, 10753638, 21507276]

約数ペア:

[(1, 21507276), (2, 10753638), (3, 7169092), (4, 5376819), (6, 3584546), (7, 3072468), (12, 1792273), (14, 1536234), (21, 1024156), (28, 768117), (42, 512078), (49, 438924), (79, 272244), (84, 256039), (98, 219462), (147, 146308), (158, 136122), (196, 109731), (237, 90748), (294, 73154), (316, 68061), (463, 46452), (474, 45374), (553, 38892), (588, 36577), (926, 23226), (948, 22687), (1106, 19446), (1389, 15484), (1659, 12964), (1852, 11613), (2212, 9723), (2778, 7742), (3241, 6636), (3318, 6482), (3871, 5556)]