19802019980

素因数分解:

$2^2\times 5^1\times {\mathrm{317}}^1\times {\mathrm{347}}^1\times {\mathrm{9001}}^1$

素因数の和:9674

約数の個数: 48

約数和(自身を含む): 41840287776

約数和(自身を除く): 22038267796

約数列:

[1, 2, 4, 5, 10, 20, 317, 347, 634, 694, 1268, 1388, 1585, 1735, 3170, 3470, 6340, 6940, 9001, 18002, 36004, 45005, 90010, 109999, 180020, 219998, 439996, 549995, 1099990, 2199980, 2853317, 3123347, 5706634, 6246694, 11413268, 12493388, 14266585, 15616735, 28533170, 31233470, 57066340, 62466940, 990100999, 1980201998, 3960403996, 4950504995, 9901009990, 19802019980]

約数ペア:

[(1, 19802019980), (2, 9901009990), (4, 4950504995), (5, 3960403996), (10, 1980201998), (20, 990100999), (317, 62466940), (347, 57066340), (634, 31233470), (694, 28533170), (1268, 15616735), (1388, 14266585), (1585, 12493388), (1735, 11413268), (3170, 6246694), (3470, 5706634), (6340, 3123347), (6940, 2853317), (9001, 2199980), (18002, 1099990), (36004, 549995), (45005, 439996), (90010, 219998), (109999, 180020)]