128815360

素因数分解:

$2^8\times 5^1\times {\mathrm{157}}^1\times {\mathrm{641}}^1$

素因数の和:819

約数の個数: 72

約数和(自身を含む): 311002776

約数和(自身を除く): 182187416

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 157, 160, 256, 314, 320, 628, 640, 641, 785, 1256, 1280, 1282, 1570, 2512, 2564, 3140, 3205, 5024, 5128, 6280, 6410, 10048, 10256, 12560, 12820, 20096, 20512, 25120, 25640, 40192, 41024, 50240, 51280, 82048, 100480, 100637, 102560, 164096, 200960, 201274, 205120, 402548, 410240, 503185, 805096, 820480, 1006370, 1610192, 2012740, 3220384, 4025480, 6440768, 8050960, 12881536, 16101920, 25763072, 32203840, 64407680, 128815360]

約数ペア:

[(1, 128815360), (2, 64407680), (4, 32203840), (5, 25763072), (8, 16101920), (10, 12881536), (16, 8050960), (20, 6440768), (32, 4025480), (40, 3220384), (64, 2012740), (80, 1610192), (128, 1006370), (157, 820480), (160, 805096), (256, 503185), (314, 410240), (320, 402548), (628, 205120), (640, 201274), (641, 200960), (785, 164096), (1256, 102560), (1280, 100637), (1282, 100480), (1570, 82048), (2512, 51280), (2564, 50240), (3140, 41024), (3205, 40192), (5024, 25640), (5128, 25120), (6280, 20512), (6410, 20096), (10048, 12820), (10256, 12560)]