18963980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{523}}^1$

素因数の和:583

約数の個数: 72

約数和(自身を含む): 47669328

約数和(自身を除く): 28705348

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 49, 70, 74, 98, 140, 148, 185, 196, 245, 259, 370, 490, 518, 523, 740, 980, 1036, 1046, 1295, 1813, 2092, 2590, 2615, 3626, 3661, 5180, 5230, 7252, 7322, 9065, 10460, 14644, 18130, 18305, 19351, 25627, 36260, 36610, 38702, 51254, 73220, 77404, 96755, 102508, 128135, 135457, 193510, 256270, 270914, 387020, 512540, 541828, 677285, 948199, 1354570, 1896398, 2709140, 3792796, 4740995, 9481990, 18963980]

約数ペア:

[(1, 18963980), (2, 9481990), (4, 4740995), (5, 3792796), (7, 2709140), (10, 1896398), (14, 1354570), (20, 948199), (28, 677285), (35, 541828), (37, 512540), (49, 387020), (70, 270914), (74, 256270), (98, 193510), (140, 135457), (148, 128135), (185, 102508), (196, 96755), (245, 77404), (259, 73220), (370, 51254), (490, 38702), (518, 36610), (523, 36260), (740, 25627), (980, 19351), (1036, 18305), (1046, 18130), (1295, 14644), (1813, 10460), (2092, 9065), (2590, 7322), (2615, 7252), (3626, 5230), (3661, 5180)]