21142275

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{523}}^1$

素因数の和:561

約数の個数: 72

約数和(自身を含む): 44443584

約数和(自身を除く): 23301309

約数列:

[1, 3, 5, 7, 11, 15, 21, 25, 33, 35, 49, 55, 75, 77, 105, 147, 165, 175, 231, 245, 275, 385, 523, 525, 539, 735, 825, 1155, 1225, 1569, 1617, 1925, 2615, 2695, 3661, 3675, 5753, 5775, 7845, 8085, 10983, 13075, 13475, 17259, 18305, 25627, 28765, 39225, 40271, 40425, 54915, 76881, 86295, 91525, 120813, 128135, 143825, 201355, 274575, 281897, 384405, 431475, 604065, 640675, 845691, 1006775, 1409485, 1922025, 3020325, 4228455, 7047425, 21142275]

約数ペア:

[(1, 21142275), (3, 7047425), (5, 4228455), (7, 3020325), (11, 1922025), (15, 1409485), (21, 1006775), (25, 845691), (33, 640675), (35, 604065), (49, 431475), (55, 384405), (75, 281897), (77, 274575), (105, 201355), (147, 143825), (165, 128135), (175, 120813), (231, 91525), (245, 86295), (275, 76881), (385, 54915), (523, 40425), (525, 40271), (539, 39225), (735, 28765), (825, 25627), (1155, 18305), (1225, 17259), (1569, 13475), (1617, 13075), (1925, 10983), (2615, 8085), (2695, 7845), (3661, 5775), (3675, 5753)]