21011660

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{2131}}^1$

素因数の和:2186

約数の個数: 48

約数和(自身を含む): 48353760

約数和(自身を除く): 27342100

約数列:

[1, 2, 4, 5, 10, 17, 20, 29, 34, 58, 68, 85, 116, 145, 170, 290, 340, 493, 580, 986, 1972, 2131, 2465, 4262, 4930, 8524, 9860, 10655, 21310, 36227, 42620, 61799, 72454, 123598, 144908, 181135, 247196, 308995, 362270, 617990, 724540, 1050583, 1235980, 2101166, 4202332, 5252915, 10505830, 21011660]

約数ペア:

[(1, 21011660), (2, 10505830), (4, 5252915), (5, 4202332), (10, 2101166), (17, 1235980), (20, 1050583), (29, 724540), (34, 617990), (58, 362270), (68, 308995), (85, 247196), (116, 181135), (145, 144908), (170, 123598), (290, 72454), (340, 61799), (493, 42620), (580, 36227), (986, 21310), (1972, 10655), (2131, 9860), (2465, 8524), (4262, 4930)]