18838576

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1999}}^1$

素因数の和:2057

約数の個数: 40

約数和(自身を含む): 39680000

約数和(自身を除く): 20841424

約数列:

[1, 2, 4, 8, 16, 19, 31, 38, 62, 76, 124, 152, 248, 304, 496, 589, 1178, 1999, 2356, 3998, 4712, 7996, 9424, 15992, 31984, 37981, 61969, 75962, 123938, 151924, 247876, 303848, 495752, 607696, 991504, 1177411, 2354822, 4709644, 9419288, 18838576]

約数ペア:

[(1, 18838576), (2, 9419288), (4, 4709644), (8, 2354822), (16, 1177411), (19, 991504), (31, 607696), (38, 495752), (62, 303848), (76, 247876), (124, 151924), (152, 123938), (248, 75962), (304, 61969), (496, 37981), (589, 31984), (1178, 15992), (1999, 9424), (2356, 7996), (3998, 4712)]