21457275

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1777}}^1$

素因数の和:1820

約数の個数: 48

約数和(自身を含む): 42330624

約数和(自身を除く): 20873349

約数列:

[1, 3, 5, 7, 15, 21, 23, 25, 35, 69, 75, 105, 115, 161, 175, 345, 483, 525, 575, 805, 1725, 1777, 2415, 4025, 5331, 8885, 12075, 12439, 26655, 37317, 40871, 44425, 62195, 122613, 133275, 186585, 204355, 286097, 310975, 613065, 858291, 932925, 1021775, 1430485, 3065325, 4291455, 7152425, 21457275]

約数ペア:

[(1, 21457275), (3, 7152425), (5, 4291455), (7, 3065325), (15, 1430485), (21, 1021775), (23, 932925), (25, 858291), (35, 613065), (69, 310975), (75, 286097), (105, 204355), (115, 186585), (161, 133275), (175, 122613), (345, 62195), (483, 44425), (525, 40871), (575, 37317), (805, 26655), (1725, 12439), (1777, 12075), (2415, 8885), (4025, 5331)]