21502365

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:158

約数の個数: 64

約数和(自身を含む): 39004416

約数和(自身を除く): 17502051

約数列:

[1, 3, 5, 15, 17, 37, 43, 51, 53, 85, 111, 129, 159, 185, 215, 255, 265, 555, 629, 645, 731, 795, 901, 1591, 1887, 1961, 2193, 2279, 2703, 3145, 3655, 4505, 4773, 5883, 6837, 7955, 9435, 9805, 10965, 11395, 13515, 23865, 27047, 29415, 33337, 34185, 38743, 81141, 84323, 100011, 116229, 135235, 166685, 193715, 252969, 405705, 421615, 500055, 581145, 1264845, 1433491, 4300473, 7167455, 21502365]

約数ペア:

[(1, 21502365), (3, 7167455), (5, 4300473), (15, 1433491), (17, 1264845), (37, 581145), (43, 500055), (51, 421615), (53, 405705), (85, 252969), (111, 193715), (129, 166685), (159, 135235), (185, 116229), (215, 100011), (255, 84323), (265, 81141), (555, 38743), (629, 34185), (645, 33337), (731, 29415), (795, 27047), (901, 23865), (1591, 13515), (1887, 11395), (1961, 10965), (2193, 9805), (2279, 9435), (2703, 7955), (3145, 6837), (3655, 5883), (4505, 4773)]