21657688

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{83}}^1\times {\mathrm{193}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 44732520

約数和(自身を除く): 23074832

約数列:

[1, 2, 4, 8, 13, 26, 52, 83, 104, 166, 169, 193, 332, 338, 386, 664, 676, 772, 1079, 1352, 1544, 2158, 2509, 4316, 5018, 8632, 10036, 14027, 16019, 20072, 28054, 32038, 32617, 56108, 64076, 65234, 112216, 128152, 130468, 208247, 260936, 416494, 832988, 1665976, 2707211, 5414422, 10828844, 21657688]

約数ペア:

[(1, 21657688), (2, 10828844), (4, 5414422), (8, 2707211), (13, 1665976), (26, 832988), (52, 416494), (83, 260936), (104, 208247), (166, 130468), (169, 128152), (193, 112216), (332, 65234), (338, 64076), (386, 56108), (664, 32617), (676, 32038), (772, 28054), (1079, 20072), (1352, 16019), (1544, 14027), (2158, 10036), (2509, 8632), (4316, 5018)]