19958960

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1229}}^1$

素因数の和:1278

約数の個数: 80

約数和(自身を含む): 54907200

約数和(自身を除く): 34948240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 35, 40, 56, 58, 70, 80, 112, 116, 140, 145, 203, 232, 280, 290, 406, 464, 560, 580, 812, 1015, 1160, 1229, 1624, 2030, 2320, 2458, 3248, 4060, 4916, 6145, 8120, 8603, 9832, 12290, 16240, 17206, 19664, 24580, 34412, 35641, 43015, 49160, 68824, 71282, 86030, 98320, 137648, 142564, 172060, 178205, 249487, 285128, 344120, 356410, 498974, 570256, 688240, 712820, 997948, 1247435, 1425640, 1995896, 2494870, 2851280, 3991792, 4989740, 9979480, 19958960]

約数ペア:

[(1, 19958960), (2, 9979480), (4, 4989740), (5, 3991792), (7, 2851280), (8, 2494870), (10, 1995896), (14, 1425640), (16, 1247435), (20, 997948), (28, 712820), (29, 688240), (35, 570256), (40, 498974), (56, 356410), (58, 344120), (70, 285128), (80, 249487), (112, 178205), (116, 172060), (140, 142564), (145, 137648), (203, 98320), (232, 86030), (280, 71282), (290, 68824), (406, 49160), (464, 43015), (560, 35641), (580, 34412), (812, 24580), (1015, 19664), (1160, 17206), (1229, 16240), (1624, 12290), (2030, 9832), (2320, 8603), (2458, 8120), (3248, 6145), (4060, 4916)]