20394563980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2051767}}^1$

素因数の和:2051854

約数の個数: 48

約数和(自身を含む): 49636371456

約数和(自身を除く): 29241807476

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2485, 4970, 9940, 2051767, 4103534, 8207068, 10258835, 14362369, 20517670, 28724738, 41035340, 57449476, 71811845, 143623690, 145675457, 287247380, 291350914, 582701828, 728377285, 1019728199, 1456754570, 2039456398, 2913509140, 4078912796, 5098640995, 10197281990, 20394563980]

約数ペア:

[(1, 20394563980), (2, 10197281990), (4, 5098640995), (5, 4078912796), (7, 2913509140), (10, 2039456398), (14, 1456754570), (20, 1019728199), (28, 728377285), (35, 582701828), (70, 291350914), (71, 287247380), (140, 145675457), (142, 143623690), (284, 71811845), (355, 57449476), (497, 41035340), (710, 28724738), (994, 20517670), (1420, 14362369), (1988, 10258835), (2485, 8207068), (4970, 4103534), (9940, 2051767)]