21139872

素因数分解:

$2^5\times 3^1\times {\mathrm{13}}^2\times {\mathrm{1303}}^1$

素因数の和:1342

約数の個数: 72

約数和(自身を含む): 60135264

約数和(自身を除く): 38995392

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 32, 39, 48, 52, 78, 96, 104, 156, 169, 208, 312, 338, 416, 507, 624, 676, 1014, 1248, 1303, 1352, 2028, 2606, 2704, 3909, 4056, 5212, 5408, 7818, 8112, 10424, 15636, 16224, 16939, 20848, 31272, 33878, 41696, 50817, 62544, 67756, 101634, 125088, 135512, 203268, 220207, 271024, 406536, 440414, 542048, 660621, 813072, 880828, 1321242, 1626144, 1761656, 2642484, 3523312, 5284968, 7046624, 10569936, 21139872]

約数ペア:

[(1, 21139872), (2, 10569936), (3, 7046624), (4, 5284968), (6, 3523312), (8, 2642484), (12, 1761656), (13, 1626144), (16, 1321242), (24, 880828), (26, 813072), (32, 660621), (39, 542048), (48, 440414), (52, 406536), (78, 271024), (96, 220207), (104, 203268), (156, 135512), (169, 125088), (208, 101634), (312, 67756), (338, 62544), (416, 50817), (507, 41696), (624, 33878), (676, 31272), (1014, 20848), (1248, 16939), (1303, 16224), (1352, 15636), (2028, 10424), (2606, 8112), (2704, 7818), (3909, 5408), (4056, 5212)]