21663520

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1907}}^1$

素因数の和:1993

約数の個数: 48

約数和(自身を含む): 51928128

約数和(自身を除く): 30264608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 142, 160, 284, 355, 568, 710, 1136, 1420, 1907, 2272, 2840, 3814, 5680, 7628, 9535, 11360, 15256, 19070, 30512, 38140, 61024, 76280, 135397, 152560, 270794, 305120, 541588, 676985, 1083176, 1353970, 2166352, 2707940, 4332704, 5415880, 10831760, 21663520]

約数ペア:

[(1, 21663520), (2, 10831760), (4, 5415880), (5, 4332704), (8, 2707940), (10, 2166352), (16, 1353970), (20, 1083176), (32, 676985), (40, 541588), (71, 305120), (80, 270794), (142, 152560), (160, 135397), (284, 76280), (355, 61024), (568, 38140), (710, 30512), (1136, 19070), (1420, 15256), (1907, 11360), (2272, 9535), (2840, 7628), (3814, 5680)]