20161286900

素因数分解:

$2^2\times 5^2\times {\mathrm{61}}^1\times {\mathrm{409}}^1\times {\mathrm{8081}}^1$

素因数の和:8565

約数の個数: 72

約数和(自身を含む): 44581443480

約数和(自身を除く): 24420156580

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 244, 305, 409, 610, 818, 1220, 1525, 1636, 2045, 3050, 4090, 6100, 8081, 8180, 10225, 16162, 20450, 24949, 32324, 40405, 40900, 49898, 80810, 99796, 124745, 161620, 202025, 249490, 404050, 492941, 498980, 623725, 808100, 985882, 1247450, 1971764, 2464705, 2494900, 3305129, 4929410, 6610258, 9858820, 12323525, 13220516, 16525645, 24647050, 33051290, 49294100, 66102580, 82628225, 165256450, 201612869, 330512900, 403225738, 806451476, 1008064345, 2016128690, 4032257380, 5040321725, 10080643450, 20161286900]

約数ペア:

[(1, 20161286900), (2, 10080643450), (4, 5040321725), (5, 4032257380), (10, 2016128690), (20, 1008064345), (25, 806451476), (50, 403225738), (61, 330512900), (100, 201612869), (122, 165256450), (244, 82628225), (305, 66102580), (409, 49294100), (610, 33051290), (818, 24647050), (1220, 16525645), (1525, 13220516), (1636, 12323525), (2045, 9858820), (3050, 6610258), (4090, 4929410), (6100, 3305129), (8081, 2494900), (8180, 2464705), (10225, 1971764), (16162, 1247450), (20450, 985882), (24949, 808100), (32324, 623725), (40405, 498980), (40900, 492941), (49898, 404050), (80810, 249490), (99796, 202025), (124745, 161620)]