128440420

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{3119}}^1$

素因数の和:3228

約数の個数: 48

約数和(自身を含む): 283046400

約数和(自身を除く): 154605980

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 71, 116, 142, 145, 284, 290, 355, 580, 710, 1420, 2059, 3119, 4118, 6238, 8236, 10295, 12476, 15595, 20590, 31190, 41180, 62380, 90451, 180902, 221449, 361804, 442898, 452255, 885796, 904510, 1107245, 1809020, 2214490, 4428980, 6422021, 12844042, 25688084, 32110105, 64220210, 128440420]

約数ペア:

[(1, 128440420), (2, 64220210), (4, 32110105), (5, 25688084), (10, 12844042), (20, 6422021), (29, 4428980), (58, 2214490), (71, 1809020), (116, 1107245), (142, 904510), (145, 885796), (284, 452255), (290, 442898), (355, 361804), (580, 221449), (710, 180902), (1420, 90451), (2059, 62380), (3119, 41180), (4118, 31190), (6238, 20590), (8236, 15595), (10295, 12476)]