18782780

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{107}}^1\times {\mathrm{131}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 40715136

約数和(自身を除く): 21932356

約数列:

[1, 2, 4, 5, 10, 20, 67, 107, 131, 134, 214, 262, 268, 335, 428, 524, 535, 655, 670, 1070, 1310, 1340, 2140, 2620, 7169, 8777, 14017, 14338, 17554, 28034, 28676, 35108, 35845, 43885, 56068, 70085, 71690, 87770, 140170, 143380, 175540, 280340, 939139, 1878278, 3756556, 4695695, 9391390, 18782780]

約数ペア:

[(1, 18782780), (2, 9391390), (4, 4695695), (5, 3756556), (10, 1878278), (20, 939139), (67, 280340), (107, 175540), (131, 143380), (134, 140170), (214, 87770), (262, 71690), (268, 70085), (335, 56068), (428, 43885), (524, 35845), (535, 35108), (655, 28676), (670, 28034), (1070, 17554), (1310, 14338), (1340, 14017), (2140, 8777), (2620, 7169)]