21224080

素因数分解:

$2^4\times 5^1\times {\mathrm{359}}^1\times {\mathrm{739}}^1$

素因数の和:1111

約数の個数: 40

約数和(自身を含む): 49550400

約数和(自身を除く): 28326320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 359, 718, 739, 1436, 1478, 1795, 2872, 2956, 3590, 3695, 5744, 5912, 7180, 7390, 11824, 14360, 14780, 28720, 29560, 59120, 265301, 530602, 1061204, 1326505, 2122408, 2653010, 4244816, 5306020, 10612040, 21224080]

約数ペア:

[(1, 21224080), (2, 10612040), (4, 5306020), (5, 4244816), (8, 2653010), (10, 2122408), (16, 1326505), (20, 1061204), (40, 530602), (80, 265301), (359, 59120), (718, 29560), (739, 28720), (1436, 14780), (1478, 14360), (1795, 11824), (2872, 7390), (2956, 7180), (3590, 5912), (3695, 5744)]