21100100

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{701}}^1$

素因数の和:765

約数の個数: 72

約数和(自身を含む): 53621568

約数和(自身を除く): 32521468

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 43, 50, 70, 86, 100, 140, 172, 175, 215, 301, 350, 430, 602, 700, 701, 860, 1075, 1204, 1402, 1505, 2150, 2804, 3010, 3505, 4300, 4907, 6020, 7010, 7525, 9814, 14020, 15050, 17525, 19628, 24535, 30100, 30143, 35050, 49070, 60286, 70100, 98140, 120572, 122675, 150715, 211001, 245350, 301430, 422002, 490700, 602860, 753575, 844004, 1055005, 1507150, 2110010, 3014300, 4220020, 5275025, 10550050, 21100100]

約数ペア:

[(1, 21100100), (2, 10550050), (4, 5275025), (5, 4220020), (7, 3014300), (10, 2110010), (14, 1507150), (20, 1055005), (25, 844004), (28, 753575), (35, 602860), (43, 490700), (50, 422002), (70, 301430), (86, 245350), (100, 211001), (140, 150715), (172, 122675), (175, 120572), (215, 98140), (301, 70100), (350, 60286), (430, 49070), (602, 35050), (700, 30143), (701, 30100), (860, 24535), (1075, 19628), (1204, 17525), (1402, 15050), (1505, 14020), (2150, 9814), (2804, 7525), (3010, 7010), (3505, 6020), (4300, 4907)]