128615680

素因数分解:

$2^8\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1129}}^1$

素因数の和:1239

約数の個数: 72

約数和(自身を含む): 311812200

約数和(自身を除く): 183196520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 256, 320, 356, 445, 640, 712, 890, 1129, 1280, 1424, 1780, 2258, 2848, 3560, 4516, 5645, 5696, 7120, 9032, 11290, 11392, 14240, 18064, 22580, 22784, 28480, 36128, 45160, 56960, 72256, 90320, 100481, 113920, 144512, 180640, 200962, 289024, 361280, 401924, 502405, 722560, 803848, 1004810, 1445120, 1607696, 2009620, 3215392, 4019240, 6430784, 8038480, 12861568, 16076960, 25723136, 32153920, 64307840, 128615680]

約数ペア:

[(1, 128615680), (2, 64307840), (4, 32153920), (5, 25723136), (8, 16076960), (10, 12861568), (16, 8038480), (20, 6430784), (32, 4019240), (40, 3215392), (64, 2009620), (80, 1607696), (89, 1445120), (128, 1004810), (160, 803848), (178, 722560), (256, 502405), (320, 401924), (356, 361280), (445, 289024), (640, 200962), (712, 180640), (890, 144512), (1129, 113920), (1280, 100481), (1424, 90320), (1780, 72256), (2258, 56960), (2848, 45160), (3560, 36128), (4516, 28480), (5645, 22784), (5696, 22580), (7120, 18064), (9032, 14240), (11290, 11392)]