21865816

素因数分解:

$2^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:284

約数の個数: 64

約数和(自身を含む): 49193280

約数和(自身を除く): 27327464

約数列:

[1, 2, 4, 7, 8, 14, 28, 37, 56, 61, 74, 122, 148, 173, 244, 259, 296, 346, 427, 488, 518, 692, 854, 1036, 1211, 1384, 1708, 2072, 2257, 2422, 3416, 4514, 4844, 6401, 9028, 9688, 10553, 12802, 15799, 18056, 21106, 25604, 31598, 42212, 44807, 51208, 63196, 73871, 84424, 89614, 126392, 147742, 179228, 295484, 358456, 390461, 590968, 780922, 1561844, 2733227, 3123688, 5466454, 10932908, 21865816]

約数ペア:

[(1, 21865816), (2, 10932908), (4, 5466454), (7, 3123688), (8, 2733227), (14, 1561844), (28, 780922), (37, 590968), (56, 390461), (61, 358456), (74, 295484), (122, 179228), (148, 147742), (173, 126392), (244, 89614), (259, 84424), (296, 73871), (346, 63196), (427, 51208), (488, 44807), (518, 42212), (692, 31598), (854, 25604), (1036, 21106), (1211, 18056), (1384, 15799), (1708, 12802), (2072, 10553), (2257, 9688), (2422, 9028), (3416, 6401), (4514, 4844)]