19940228

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{641}}^1$

素因数の和:764

約数の個数: 48

約数和(自身を含む): 44005248

約数和(自身を除く): 24065020

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 101, 154, 202, 308, 404, 641, 707, 1111, 1282, 1414, 2222, 2564, 2828, 4444, 4487, 7051, 7777, 8974, 14102, 15554, 17948, 28204, 31108, 49357, 64741, 98714, 129482, 197428, 258964, 453187, 712151, 906374, 1424302, 1812748, 2848604, 4985057, 9970114, 19940228]

約数ペア:

[(1, 19940228), (2, 9970114), (4, 4985057), (7, 2848604), (11, 1812748), (14, 1424302), (22, 906374), (28, 712151), (44, 453187), (77, 258964), (101, 197428), (154, 129482), (202, 98714), (308, 64741), (404, 49357), (641, 31108), (707, 28204), (1111, 17948), (1282, 15554), (1414, 14102), (2222, 8974), (2564, 7777), (2828, 7051), (4444, 4487)]