128400560

素因数分解:

$2^4\times 5^1\times {\mathrm{839}}^1\times {\mathrm{1913}}^1$

素因数の和:2765

約数の個数: 40

約数和(自身を含む): 299043360

約数和(自身を除く): 170642800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 839, 1678, 1913, 3356, 3826, 4195, 6712, 7652, 8390, 9565, 13424, 15304, 16780, 19130, 30608, 33560, 38260, 67120, 76520, 153040, 1605007, 3210014, 6420028, 8025035, 12840056, 16050070, 25680112, 32100140, 64200280, 128400560]

約数ペア:

[(1, 128400560), (2, 64200280), (4, 32100140), (5, 25680112), (8, 16050070), (10, 12840056), (16, 8025035), (20, 6420028), (40, 3210014), (80, 1605007), (839, 153040), (1678, 76520), (1913, 67120), (3356, 38260), (3826, 33560), (4195, 30608), (6712, 19130), (7652, 16780), (8390, 15304), (9565, 13424)]