21587860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{271}}^1\times {\mathrm{569}}^1$

素因数の和:856

約数の個数: 48

約数和(自身を含む): 52093440

約数和(自身を除く): 30505580

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 271, 542, 569, 1084, 1138, 1355, 1897, 2276, 2710, 2845, 3794, 3983, 5420, 5690, 7588, 7966, 9485, 11380, 15932, 18970, 19915, 37940, 39830, 79660, 154199, 308398, 616796, 770995, 1079393, 1541990, 2158786, 3083980, 4317572, 5396965, 10793930, 21587860]

約数ペア:

[(1, 21587860), (2, 10793930), (4, 5396965), (5, 4317572), (7, 3083980), (10, 2158786), (14, 1541990), (20, 1079393), (28, 770995), (35, 616796), (70, 308398), (140, 154199), (271, 79660), (542, 39830), (569, 37940), (1084, 19915), (1138, 18970), (1355, 15932), (1897, 11380), (2276, 9485), (2710, 7966), (2845, 7588), (3794, 5690), (3983, 5420)]