81187120

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{149}}^1$

素因数の和:315

約数の個数: 120

約数和(自身を含む): 222642000

約数和(自身を除く): 141454880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 139, 140, 149, 196, 245, 278, 280, 298, 392, 490, 556, 560, 596, 695, 745, 784, 973, 980, 1043, 1112, 1192, 1390, 1490, 1946, 1960, 2086, 2224, 2384, 2780, 2980, 3892, 3920, 4172, 4865, 5215, 5560, 5960, 6811, 7301, 7784, 8344, 9730, 10430, 11120, 11920, 13622, 14602, 15568, 16688, 19460, 20711, 20860, 27244, 29204, 34055, 36505, 38920, 41422, 41720, 54488, 58408, 68110, 73010, 77840, 82844, 83440, 103555, 108976, 116816, 136220, 144977, 146020, 165688, 207110, 272440, 289954, 292040, 331376, 414220, 544880, 579908, 584080, 724885, 828440, 1014839, 1159816, 1449770, 1656880, 2029678, 2319632, 2899540, 4059356, 5074195, 5799080, 8118712, 10148390, 11598160, 16237424, 20296780, 40593560, 81187120]

約数ペア:

[(1, 81187120), (2, 40593560), (4, 20296780), (5, 16237424), (7, 11598160), (8, 10148390), (10, 8118712), (14, 5799080), (16, 5074195), (20, 4059356), (28, 2899540), (35, 2319632), (40, 2029678), (49, 1656880), (56, 1449770), (70, 1159816), (80, 1014839), (98, 828440), (112, 724885), (139, 584080), (140, 579908), (149, 544880), (196, 414220), (245, 331376), (278, 292040), (280, 289954), (298, 272440), (392, 207110), (490, 165688), (556, 146020), (560, 144977), (596, 136220), (695, 116816), (745, 108976), (784, 103555), (973, 83440), (980, 82844), (1043, 77840), (1112, 73010), (1192, 68110), (1390, 58408), (1490, 54488), (1946, 41720), (1960, 41422), (2086, 38920), (2224, 36505), (2384, 34055), (2780, 29204), (2980, 27244), (3892, 20860), (3920, 20711), (4172, 19460), (4865, 16688), (5215, 15568), (5560, 14602), (5960, 13622), (6811, 11920), (7301, 11120), (7784, 10430), (8344, 9730)]