81611920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{809}}^1$

素因数の和:932

約数の個数: 80

約数和(自身を含む): 206705520

約数和(自身を除く): 125093600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 97, 104, 130, 194, 208, 260, 388, 485, 520, 776, 809, 970, 1040, 1261, 1552, 1618, 1940, 2522, 3236, 3880, 4045, 5044, 6305, 6472, 7760, 8090, 10088, 10517, 12610, 12944, 16180, 20176, 21034, 25220, 32360, 42068, 50440, 52585, 64720, 78473, 84136, 100880, 105170, 156946, 168272, 210340, 313892, 392365, 420680, 627784, 784730, 841360, 1020149, 1255568, 1569460, 2040298, 3138920, 4080596, 5100745, 6277840, 8161192, 10201490, 16322384, 20402980, 40805960, 81611920]

約数ペア:

[(1, 81611920), (2, 40805960), (4, 20402980), (5, 16322384), (8, 10201490), (10, 8161192), (13, 6277840), (16, 5100745), (20, 4080596), (26, 3138920), (40, 2040298), (52, 1569460), (65, 1255568), (80, 1020149), (97, 841360), (104, 784730), (130, 627784), (194, 420680), (208, 392365), (260, 313892), (388, 210340), (485, 168272), (520, 156946), (776, 105170), (809, 100880), (970, 84136), (1040, 78473), (1261, 64720), (1552, 52585), (1618, 50440), (1940, 42068), (2522, 32360), (3236, 25220), (3880, 21034), (4045, 20176), (5044, 16180), (6305, 12944), (6472, 12610), (7760, 10517), (8090, 10088)]