20520140

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{1439}}^1$

素因数の和:1502

約数の個数: 48

約数和(自身を含む): 46448640

約数和(自身を除く): 25928500

約数列:

[1, 2, 4, 5, 10, 20, 23, 31, 46, 62, 92, 115, 124, 155, 230, 310, 460, 620, 713, 1426, 1439, 2852, 2878, 3565, 5756, 7130, 7195, 14260, 14390, 28780, 33097, 44609, 66194, 89218, 132388, 165485, 178436, 223045, 330970, 446090, 661940, 892180, 1026007, 2052014, 4104028, 5130035, 10260070, 20520140]

約数ペア:

[(1, 20520140), (2, 10260070), (4, 5130035), (5, 4104028), (10, 2052014), (20, 1026007), (23, 892180), (31, 661940), (46, 446090), (62, 330970), (92, 223045), (115, 178436), (124, 165485), (155, 132388), (230, 89218), (310, 66194), (460, 44609), (620, 33097), (713, 28780), (1426, 14390), (1439, 14260), (2852, 7195), (2878, 7130), (3565, 5756)]