17978260

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{223}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 39513600

約数和(自身を除く): 21535340

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 139, 145, 223, 278, 290, 446, 556, 580, 695, 892, 1115, 1390, 2230, 2780, 4031, 4460, 6467, 8062, 12934, 16124, 20155, 25868, 30997, 32335, 40310, 61994, 64670, 80620, 123988, 129340, 154985, 309970, 619940, 898913, 1797826, 3595652, 4494565, 8989130, 17978260]

約数ペア:

[(1, 17978260), (2, 8989130), (4, 4494565), (5, 3595652), (10, 1797826), (20, 898913), (29, 619940), (58, 309970), (116, 154985), (139, 129340), (145, 123988), (223, 80620), (278, 64670), (290, 61994), (446, 40310), (556, 32335), (580, 30997), (695, 25868), (892, 20155), (1115, 16124), (1390, 12934), (2230, 8062), (2780, 6467), (4031, 4460)]