20987213898

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{251}}^1\times {\mathrm{647}}^1$

素因数の和:1108

約数の個数: 128

約数和(自身を含む): 51355938816

約数和(自身を除く): 30368724918

約数列:

[1, 2, 3, 6, 7, 14, 17, 21, 34, 42, 51, 102, 119, 181, 238, 251, 357, 362, 502, 543, 647, 714, 753, 1086, 1267, 1294, 1506, 1757, 1941, 2534, 3077, 3514, 3801, 3882, 4267, 4529, 5271, 6154, 7602, 8534, 9058, 9231, 10542, 10999, 12801, 13587, 18462, 21539, 21998, 25602, 27174, 29869, 32997, 43078, 45431, 59738, 64617, 65994, 76993, 89607, 90862, 117107, 129234, 136293, 153986, 162397, 179214, 230979, 234214, 272586, 318017, 324794, 351321, 461958, 487191, 636034, 702642, 772327, 819749, 954051, 974382, 1136779, 1544654, 1639498, 1908102, 1990819, 2273558, 2316981, 2459247, 2760749, 3410337, 3981638, 4633962, 4918494, 5406289, 5521498, 5972457, 6820674, 8282247, 10812578, 11944914, 13935733, 16218867, 16564494, 19325243, 27871466, 29393857, 32437734, 38650486, 41807199, 57975729, 58787714, 83614398, 88181571, 115951458, 176363142, 205756999, 411513998, 499695569, 617270997, 999391138, 1234541994, 1499086707, 2998173414, 3497868983, 6995737966, 10493606949, 20987213898]

約数ペア:

[(1, 20987213898), (2, 10493606949), (3, 6995737966), (6, 3497868983), (7, 2998173414), (14, 1499086707), (17, 1234541994), (21, 999391138), (34, 617270997), (42, 499695569), (51, 411513998), (102, 205756999), (119, 176363142), (181, 115951458), (238, 88181571), (251, 83614398), (357, 58787714), (362, 57975729), (502, 41807199), (543, 38650486), (647, 32437734), (714, 29393857), (753, 27871466), (1086, 19325243), (1267, 16564494), (1294, 16218867), (1506, 13935733), (1757, 11944914), (1941, 10812578), (2534, 8282247), (3077, 6820674), (3514, 5972457), (3801, 5521498), (3882, 5406289), (4267, 4918494), (4529, 4633962), (5271, 3981638), (6154, 3410337), (7602, 2760749), (8534, 2459247), (9058, 2316981), (9231, 2273558), (10542, 1990819), (10999, 1908102), (12801, 1639498), (13587, 1544654), (18462, 1136779), (21539, 974382), (21998, 954051), (25602, 819749), (27174, 772327), (29869, 702642), (32997, 636034), (43078, 487191), (45431, 461958), (59738, 351321), (64617, 324794), (65994, 318017), (76993, 272586), (89607, 234214), (90862, 230979), (117107, 179214), (129234, 162397), (136293, 153986)]