20512606640

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{247259}}^1$

素因数の和:247350

約数の個数: 80

約数和(自身を含む): 51325241760

約数和(自身を除く): 30812635120

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 61, 68, 80, 85, 122, 136, 170, 244, 272, 305, 340, 488, 610, 680, 976, 1037, 1220, 1360, 2074, 2440, 4148, 4880, 5185, 8296, 10370, 16592, 20740, 41480, 82960, 247259, 494518, 989036, 1236295, 1978072, 2472590, 3956144, 4203403, 4945180, 8406806, 9890360, 15082799, 16813612, 19780720, 21017015, 30165598, 33627224, 42034030, 60331196, 67254448, 75413995, 84068060, 120662392, 150827990, 168136120, 241324784, 256407583, 301655980, 336272240, 512815166, 603311960, 1025630332, 1206623920, 1282037915, 2051260664, 2564075830, 4102521328, 5128151660, 10256303320, 20512606640]

約数ペア:

[(1, 20512606640), (2, 10256303320), (4, 5128151660), (5, 4102521328), (8, 2564075830), (10, 2051260664), (16, 1282037915), (17, 1206623920), (20, 1025630332), (34, 603311960), (40, 512815166), (61, 336272240), (68, 301655980), (80, 256407583), (85, 241324784), (122, 168136120), (136, 150827990), (170, 120662392), (244, 84068060), (272, 75413995), (305, 67254448), (340, 60331196), (488, 42034030), (610, 33627224), (680, 30165598), (976, 21017015), (1037, 19780720), (1220, 16813612), (1360, 15082799), (2074, 9890360), (2440, 8406806), (4148, 4945180), (4880, 4203403), (5185, 3956144), (8296, 2472590), (10370, 1978072), (16592, 1236295), (20740, 989036), (41480, 494518), (82960, 247259)]