20852728

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 45309600

約数和(自身を除く): 24456872

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 61, 76, 104, 122, 152, 173, 244, 247, 346, 488, 494, 692, 793, 988, 1159, 1384, 1586, 1976, 2249, 2318, 3172, 3287, 4498, 4636, 6344, 6574, 8996, 9272, 10553, 13148, 15067, 17992, 21106, 26296, 30134, 42212, 42731, 60268, 84424, 85462, 120536, 137189, 170924, 200507, 274378, 341848, 401014, 548756, 802028, 1097512, 1604056, 2606591, 5213182, 10426364, 20852728]

約数ペア:

[(1, 20852728), (2, 10426364), (4, 5213182), (8, 2606591), (13, 1604056), (19, 1097512), (26, 802028), (38, 548756), (52, 401014), (61, 341848), (76, 274378), (104, 200507), (122, 170924), (152, 137189), (173, 120536), (244, 85462), (247, 84424), (346, 60268), (488, 42731), (494, 42212), (692, 30134), (793, 26296), (988, 21106), (1159, 17992), (1384, 15067), (1586, 13148), (1976, 10553), (2249, 9272), (2318, 8996), (3172, 6574), (3287, 6344), (4498, 4636)]