21478204

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{167}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 42900480

約数和(自身を除く): 21422276

約数列:

[1, 2, 4, 11, 22, 37, 44, 74, 79, 148, 158, 167, 316, 334, 407, 668, 814, 869, 1628, 1738, 1837, 2923, 3476, 3674, 5846, 6179, 7348, 11692, 12358, 13193, 24716, 26386, 32153, 52772, 64306, 67969, 128612, 135938, 145123, 271876, 290246, 488141, 580492, 976282, 1952564, 5369551, 10739102, 21478204]

約数ペア:

[(1, 21478204), (2, 10739102), (4, 5369551), (11, 1952564), (22, 976282), (37, 580492), (44, 488141), (74, 290246), (79, 271876), (148, 145123), (158, 135938), (167, 128612), (316, 67969), (334, 64306), (407, 52772), (668, 32153), (814, 26386), (869, 24716), (1628, 13193), (1738, 12358), (1837, 11692), (2923, 7348), (3476, 6179), (3674, 5846)]