21072560

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{293}}^1$

素因数の和:366

約数の個数: 80

約数和(自身を含む): 52496640

約数和(自身を除く): 31424080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 31, 40, 58, 62, 80, 116, 124, 145, 155, 232, 248, 290, 293, 310, 464, 496, 580, 586, 620, 899, 1160, 1172, 1240, 1465, 1798, 2320, 2344, 2480, 2930, 3596, 4495, 4688, 5860, 7192, 8497, 8990, 9083, 11720, 14384, 16994, 17980, 18166, 23440, 33988, 35960, 36332, 42485, 45415, 67976, 71920, 72664, 84970, 90830, 135952, 145328, 169940, 181660, 263407, 339880, 363320, 526814, 679760, 726640, 1053628, 1317035, 2107256, 2634070, 4214512, 5268140, 10536280, 21072560]

約数ペア:

[(1, 21072560), (2, 10536280), (4, 5268140), (5, 4214512), (8, 2634070), (10, 2107256), (16, 1317035), (20, 1053628), (29, 726640), (31, 679760), (40, 526814), (58, 363320), (62, 339880), (80, 263407), (116, 181660), (124, 169940), (145, 145328), (155, 135952), (232, 90830), (248, 84970), (290, 72664), (293, 71920), (310, 67976), (464, 45415), (496, 42485), (580, 36332), (586, 35960), (620, 33988), (899, 23440), (1160, 18166), (1172, 17980), (1240, 16994), (1465, 14384), (1798, 11720), (2320, 9083), (2344, 8990), (2480, 8497), (2930, 7192), (3596, 5860), (4495, 4688)]