18550028

素因数分解:

$2^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:163

約数の個数: 72

約数和(自身を含む): 40449024

約数和(自身を除く): 21898996

約数列:

[1, 2, 4, 7, 14, 28, 31, 43, 49, 62, 71, 86, 98, 124, 142, 172, 196, 217, 284, 301, 434, 497, 602, 868, 994, 1204, 1333, 1519, 1988, 2107, 2201, 2666, 3038, 3053, 3479, 4214, 4402, 5332, 6076, 6106, 6958, 8428, 8804, 9331, 12212, 13916, 15407, 18662, 21371, 30814, 37324, 42742, 61628, 65317, 85484, 94643, 107849, 130634, 149597, 189286, 215698, 261268, 299194, 378572, 431396, 598388, 662501, 1325002, 2650004, 4637507, 9275014, 18550028]

約数ペア:

[(1, 18550028), (2, 9275014), (4, 4637507), (7, 2650004), (14, 1325002), (28, 662501), (31, 598388), (43, 431396), (49, 378572), (62, 299194), (71, 261268), (86, 215698), (98, 189286), (124, 149597), (142, 130634), (172, 107849), (196, 94643), (217, 85484), (284, 65317), (301, 61628), (434, 42742), (497, 37324), (602, 30814), (868, 21371), (994, 18662), (1204, 15407), (1333, 13916), (1519, 12212), (1988, 9331), (2107, 8804), (2201, 8428), (2666, 6958), (3038, 6106), (3053, 6076), (3479, 5332), (4214, 4402)]