18791456

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{997}}^1$

素因数の和:1057

約数の個数: 48

約数和(自身を含む): 40239360

約数和(自身を除く): 21447904

約数列:

[1, 2, 4, 8, 16, 19, 31, 32, 38, 62, 76, 124, 152, 248, 304, 496, 589, 608, 992, 997, 1178, 1994, 2356, 3988, 4712, 7976, 9424, 15952, 18848, 18943, 30907, 31904, 37886, 61814, 75772, 123628, 151544, 247256, 303088, 494512, 587233, 606176, 989024, 1174466, 2348932, 4697864, 9395728, 18791456]

約数ペア:

[(1, 18791456), (2, 9395728), (4, 4697864), (8, 2348932), (16, 1174466), (19, 989024), (31, 606176), (32, 587233), (38, 494512), (62, 303088), (76, 247256), (124, 151544), (152, 123628), (248, 75772), (304, 61814), (496, 37886), (589, 31904), (608, 30907), (992, 18943), (997, 18848), (1178, 15952), (1994, 9424), (2356, 7976), (3988, 4712)]