21030420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{269}}^1\times {\mathrm{1303}}^1$

素因数の和:1584

約数の個数: 48

約数和(自身を含む): 59149440

約数和(自身を除く): 38119020

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 269, 538, 807, 1076, 1303, 1345, 1614, 2606, 2690, 3228, 3909, 4035, 5212, 5380, 6515, 7818, 8070, 13030, 15636, 16140, 19545, 26060, 39090, 78180, 350507, 701014, 1051521, 1402028, 1752535, 2103042, 3505070, 4206084, 5257605, 7010140, 10515210, 21030420]

約数ペア:

[(1, 21030420), (2, 10515210), (3, 7010140), (4, 5257605), (5, 4206084), (6, 3505070), (10, 2103042), (12, 1752535), (15, 1402028), (20, 1051521), (30, 701014), (60, 350507), (269, 78180), (538, 39090), (807, 26060), (1076, 19545), (1303, 16140), (1345, 15636), (1614, 13030), (2606, 8070), (2690, 7818), (3228, 6515), (3909, 5380), (4035, 5212)]