21265636

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{563}}^1$

素因数の和:664

約数の個数: 48

約数和(自身を含む): 45480960

約数和(自身を除く): 24215324

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 71, 76, 133, 142, 266, 284, 497, 532, 563, 994, 1126, 1349, 1988, 2252, 2698, 3941, 5396, 7882, 9443, 10697, 15764, 18886, 21394, 37772, 39973, 42788, 74879, 79946, 149758, 159892, 279811, 299516, 559622, 759487, 1119244, 1518974, 3037948, 5316409, 10632818, 21265636]

約数ペア:

[(1, 21265636), (2, 10632818), (4, 5316409), (7, 3037948), (14, 1518974), (19, 1119244), (28, 759487), (38, 559622), (71, 299516), (76, 279811), (133, 159892), (142, 149758), (266, 79946), (284, 74879), (497, 42788), (532, 39973), (563, 37772), (994, 21394), (1126, 18886), (1349, 15764), (1988, 10697), (2252, 9443), (2698, 7882), (3941, 5396)]