21327760

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^2\times {\mathrm{317}}^1$

素因数の和:388

約数の個数: 60

約数和(自身を含む): 51517908

約数和(自身を除く): 30190148

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 317, 464, 580, 634, 841, 1160, 1268, 1585, 1682, 2320, 2536, 3170, 3364, 4205, 5072, 6340, 6728, 8410, 9193, 12680, 13456, 16820, 18386, 25360, 33640, 36772, 45965, 67280, 73544, 91930, 147088, 183860, 266597, 367720, 533194, 735440, 1066388, 1332985, 2132776, 2665970, 4265552, 5331940, 10663880, 21327760]

約数ペア:

[(1, 21327760), (2, 10663880), (4, 5331940), (5, 4265552), (8, 2665970), (10, 2132776), (16, 1332985), (20, 1066388), (29, 735440), (40, 533194), (58, 367720), (80, 266597), (116, 183860), (145, 147088), (232, 91930), (290, 73544), (317, 67280), (464, 45965), (580, 36772), (634, 33640), (841, 25360), (1160, 18386), (1268, 16820), (1585, 13456), (1682, 12680), (2320, 9193), (2536, 8410), (3170, 6728), (3364, 6340), (4205, 5072)]