21420700

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{431}}^1$

素因数の和:523

約数の個数: 72

約数和(自身を含む): 53996544

約数和(自身を除く): 32575844

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 71, 100, 140, 142, 175, 284, 350, 355, 431, 497, 700, 710, 862, 994, 1420, 1724, 1775, 1988, 2155, 2485, 3017, 3550, 4310, 4970, 6034, 7100, 8620, 9940, 10775, 12068, 12425, 15085, 21550, 24850, 30170, 30601, 43100, 49700, 60340, 61202, 75425, 122404, 150850, 153005, 214207, 301700, 306010, 428414, 612020, 765025, 856828, 1071035, 1530050, 2142070, 3060100, 4284140, 5355175, 10710350, 21420700]

約数ペア:

[(1, 21420700), (2, 10710350), (4, 5355175), (5, 4284140), (7, 3060100), (10, 2142070), (14, 1530050), (20, 1071035), (25, 856828), (28, 765025), (35, 612020), (50, 428414), (70, 306010), (71, 301700), (100, 214207), (140, 153005), (142, 150850), (175, 122404), (284, 75425), (350, 61202), (355, 60340), (431, 49700), (497, 43100), (700, 30601), (710, 30170), (862, 24850), (994, 21550), (1420, 15085), (1724, 12425), (1775, 12068), (1988, 10775), (2155, 9940), (2485, 8620), (3017, 7100), (3550, 6034), (4310, 4970)]