28374440

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 66044160

約数和(自身を除く): 37669720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 97, 103, 142, 194, 206, 284, 355, 388, 412, 485, 515, 568, 710, 776, 824, 970, 1030, 1420, 1940, 2060, 2840, 3880, 4120, 6887, 7313, 9991, 13774, 14626, 19982, 27548, 29252, 34435, 36565, 39964, 49955, 55096, 58504, 68870, 73130, 79928, 99910, 137740, 146260, 199820, 275480, 292520, 399640, 709361, 1418722, 2837444, 3546805, 5674888, 7093610, 14187220, 28374440]

約数ペア:

[(1, 28374440), (2, 14187220), (4, 7093610), (5, 5674888), (8, 3546805), (10, 2837444), (20, 1418722), (40, 709361), (71, 399640), (97, 292520), (103, 275480), (142, 199820), (194, 146260), (206, 137740), (284, 99910), (355, 79928), (388, 73130), (412, 68870), (485, 58504), (515, 55096), (568, 49955), (710, 39964), (776, 36565), (824, 34435), (970, 29252), (1030, 27548), (1420, 19982), (1940, 14626), (2060, 13774), (2840, 9991), (3880, 7313), (4120, 6887)]