21648416

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{157}}^1$

素因数の和:337

約数の個数: 48

約数和(自身を含む): 44593920

約数和(自身を除く): 22945504

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 124, 139, 157, 248, 278, 314, 496, 556, 628, 992, 1112, 1256, 2224, 2512, 4309, 4448, 4867, 5024, 8618, 9734, 17236, 19468, 21823, 34472, 38936, 43646, 68944, 77872, 87292, 137888, 155744, 174584, 349168, 676513, 698336, 1353026, 2706052, 5412104, 10824208, 21648416]

約数ペア:

[(1, 21648416), (2, 10824208), (4, 5412104), (8, 2706052), (16, 1353026), (31, 698336), (32, 676513), (62, 349168), (124, 174584), (139, 155744), (157, 137888), (248, 87292), (278, 77872), (314, 68944), (496, 43646), (556, 38936), (628, 34472), (992, 21823), (1112, 19468), (1256, 17236), (2224, 9734), (2512, 8618), (4309, 5024), (4448, 4867)]