21014140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{523}}^1$

素因数の和:587

約数の個数: 72

約数和(自身を含む): 52687152

約数和(自身を除く): 31673012

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 49, 70, 82, 98, 140, 164, 196, 205, 245, 287, 410, 490, 523, 574, 820, 980, 1046, 1148, 1435, 2009, 2092, 2615, 2870, 3661, 4018, 5230, 5740, 7322, 8036, 10045, 10460, 14644, 18305, 20090, 21443, 25627, 36610, 40180, 42886, 51254, 73220, 85772, 102508, 107215, 128135, 150101, 214430, 256270, 300202, 428860, 512540, 600404, 750505, 1050707, 1501010, 2101414, 3002020, 4202828, 5253535, 10507070, 21014140]

約数ペア:

[(1, 21014140), (2, 10507070), (4, 5253535), (5, 4202828), (7, 3002020), (10, 2101414), (14, 1501010), (20, 1050707), (28, 750505), (35, 600404), (41, 512540), (49, 428860), (70, 300202), (82, 256270), (98, 214430), (140, 150101), (164, 128135), (196, 107215), (205, 102508), (245, 85772), (287, 73220), (410, 51254), (490, 42886), (523, 40180), (574, 36610), (820, 25627), (980, 21443), (1046, 20090), (1148, 18305), (1435, 14644), (2009, 10460), (2092, 10045), (2615, 8036), (2870, 7322), (3661, 5740), (4018, 5230)]