21697040

素因数分解:

$2^4\times 5^1\times {\mathrm{367}}^1\times {\mathrm{739}}^1$

素因数の和:1119

約数の個数: 40

約数和(自身を含む): 50651520

約数和(自身を除く): 28954480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 367, 734, 739, 1468, 1478, 1835, 2936, 2956, 3670, 3695, 5872, 5912, 7340, 7390, 11824, 14680, 14780, 29360, 29560, 59120, 271213, 542426, 1084852, 1356065, 2169704, 2712130, 4339408, 5424260, 10848520, 21697040]

約数ペア:

[(1, 21697040), (2, 10848520), (4, 5424260), (5, 4339408), (8, 2712130), (10, 2169704), (16, 1356065), (20, 1084852), (40, 542426), (80, 271213), (367, 59120), (734, 29560), (739, 29360), (1468, 14780), (1478, 14680), (1835, 11824), (2936, 7390), (2956, 7340), (3670, 5912), (3695, 5872)]