21760408

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^2$

素因数の和:188

約数の個数: 48

約数和(自身を含む): 44942040

約数和(自身を除く): 23181632

約数列:

[1, 2, 4, 8, 17, 34, 43, 61, 68, 86, 122, 136, 172, 244, 344, 488, 731, 1037, 1462, 2074, 2623, 2924, 3721, 4148, 5246, 5848, 7442, 8296, 10492, 14884, 20984, 29768, 44591, 63257, 89182, 126514, 160003, 178364, 253028, 320006, 356728, 506056, 640012, 1280024, 2720051, 5440102, 10880204, 21760408]

約数ペア:

[(1, 21760408), (2, 10880204), (4, 5440102), (8, 2720051), (17, 1280024), (34, 640012), (43, 506056), (61, 356728), (68, 320006), (86, 253028), (122, 178364), (136, 160003), (172, 126514), (244, 89182), (344, 63257), (488, 44591), (731, 29768), (1037, 20984), (1462, 14884), (2074, 10492), (2623, 8296), (2924, 7442), (3721, 5848), (4148, 5246)]