81197980

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{179}}^1\times {\mathrm{613}}^1$

素因数の和:838

約数の個数: 48

約数和(自身を含む): 176389920

約数和(自身を除く): 95191940

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 179, 185, 358, 370, 613, 716, 740, 895, 1226, 1790, 2452, 3065, 3580, 6130, 6623, 12260, 13246, 22681, 26492, 33115, 45362, 66230, 90724, 109727, 113405, 132460, 219454, 226810, 438908, 453620, 548635, 1097270, 2194540, 4059899, 8119798, 16239596, 20299495, 40598990, 81197980]

約数ペア:

[(1, 81197980), (2, 40598990), (4, 20299495), (5, 16239596), (10, 8119798), (20, 4059899), (37, 2194540), (74, 1097270), (148, 548635), (179, 453620), (185, 438908), (358, 226810), (370, 219454), (613, 132460), (716, 113405), (740, 109727), (895, 90724), (1226, 66230), (1790, 45362), (2452, 33115), (3065, 26492), (3580, 22681), (6130, 13246), (6623, 12260)]