21430240

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10303}}^1$

素因数の和:10331

約数の個数: 48

約数和(自身を含む): 54528768

約数和(自身を除く): 33098528

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10303, 20606, 41212, 51515, 82424, 103030, 133939, 164848, 206060, 267878, 329696, 412120, 535756, 669695, 824240, 1071512, 1339390, 1648480, 2143024, 2678780, 4286048, 5357560, 10715120, 21430240]

約数ペア:

[(1, 21430240), (2, 10715120), (4, 5357560), (5, 4286048), (8, 2678780), (10, 2143024), (13, 1648480), (16, 1339390), (20, 1071512), (26, 824240), (32, 669695), (40, 535756), (52, 412120), (65, 329696), (80, 267878), (104, 206060), (130, 164848), (160, 133939), (208, 103030), (260, 82424), (416, 51515), (520, 41212), (1040, 20606), (2080, 10303)]