21071840

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:220

約数の個数: 96

約数和(自身を含む): 53996544

約数和(自身を除く): 32924704

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 61, 68, 80, 85, 122, 127, 136, 160, 170, 244, 254, 272, 305, 340, 488, 508, 544, 610, 635, 680, 976, 1016, 1037, 1220, 1270, 1360, 1952, 2032, 2074, 2159, 2440, 2540, 2720, 4064, 4148, 4318, 4880, 5080, 5185, 7747, 8296, 8636, 9760, 10160, 10370, 10795, 15494, 16592, 17272, 20320, 20740, 21590, 30988, 33184, 34544, 38735, 41480, 43180, 61976, 69088, 77470, 82960, 86360, 123952, 131699, 154940, 165920, 172720, 247904, 263398, 309880, 345440, 526796, 619760, 658495, 1053592, 1239520, 1316990, 2107184, 2633980, 4214368, 5267960, 10535920, 21071840]

約数ペア:

[(1, 21071840), (2, 10535920), (4, 5267960), (5, 4214368), (8, 2633980), (10, 2107184), (16, 1316990), (17, 1239520), (20, 1053592), (32, 658495), (34, 619760), (40, 526796), (61, 345440), (68, 309880), (80, 263398), (85, 247904), (122, 172720), (127, 165920), (136, 154940), (160, 131699), (170, 123952), (244, 86360), (254, 82960), (272, 77470), (305, 69088), (340, 61976), (488, 43180), (508, 41480), (544, 38735), (610, 34544), (635, 33184), (680, 30988), (976, 21590), (1016, 20740), (1037, 20320), (1220, 17272), (1270, 16592), (1360, 15494), (1952, 10795), (2032, 10370), (2074, 10160), (2159, 9760), (2440, 8636), (2540, 8296), (2720, 7747), (4064, 5185), (4148, 5080), (4318, 4880)]