21381720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:225

約数の個数: 128

約数和(自身を含む): 68567040

約数和(自身を除く): 47185320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 23, 24, 30, 40, 46, 60, 61, 69, 92, 115, 120, 122, 127, 138, 183, 184, 230, 244, 254, 276, 305, 345, 366, 381, 460, 488, 508, 552, 610, 635, 690, 732, 762, 915, 920, 1016, 1220, 1270, 1380, 1403, 1464, 1524, 1830, 1905, 2440, 2540, 2760, 2806, 2921, 3048, 3660, 3810, 4209, 5080, 5612, 5842, 7015, 7320, 7620, 7747, 8418, 8763, 11224, 11684, 14030, 14605, 15240, 15494, 16836, 17526, 21045, 23241, 23368, 28060, 29210, 30988, 33672, 35052, 38735, 42090, 43815, 46482, 56120, 58420, 61976, 70104, 77470, 84180, 87630, 92964, 116205, 116840, 154940, 168360, 175260, 178181, 185928, 232410, 309880, 350520, 356362, 464820, 534543, 712724, 890905, 929640, 1069086, 1425448, 1781810, 2138172, 2672715, 3563620, 4276344, 5345430, 7127240, 10690860, 21381720]

約数ペア:

[(1, 21381720), (2, 10690860), (3, 7127240), (4, 5345430), (5, 4276344), (6, 3563620), (8, 2672715), (10, 2138172), (12, 1781810), (15, 1425448), (20, 1069086), (23, 929640), (24, 890905), (30, 712724), (40, 534543), (46, 464820), (60, 356362), (61, 350520), (69, 309880), (92, 232410), (115, 185928), (120, 178181), (122, 175260), (127, 168360), (138, 154940), (183, 116840), (184, 116205), (230, 92964), (244, 87630), (254, 84180), (276, 77470), (305, 70104), (345, 61976), (366, 58420), (381, 56120), (460, 46482), (488, 43815), (508, 42090), (552, 38735), (610, 35052), (635, 33672), (690, 30988), (732, 29210), (762, 28060), (915, 23368), (920, 23241), (1016, 21045), (1220, 17526), (1270, 16836), (1380, 15494), (1403, 15240), (1464, 14605), (1524, 14030), (1830, 11684), (1905, 11224), (2440, 8763), (2540, 8418), (2760, 7747), (2806, 7620), (2921, 7320), (3048, 7015), (3660, 5842), (3810, 5612), (4209, 5080)]