21949040

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{16139}}^1$

素因数の和:16169

約数の個数: 40

約数和(自身を含む): 54036720

約数和(自身を除く): 32087680

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 16139, 32278, 64556, 80695, 129112, 161390, 258224, 274363, 322780, 548726, 645560, 1097452, 1291120, 1371815, 2194904, 2743630, 4389808, 5487260, 10974520, 21949040]

約数ペア:

[(1, 21949040), (2, 10974520), (4, 5487260), (5, 4389808), (8, 2743630), (10, 2194904), (16, 1371815), (17, 1291120), (20, 1097452), (34, 645560), (40, 548726), (68, 322780), (80, 274363), (85, 258224), (136, 161390), (170, 129112), (272, 80695), (340, 64556), (680, 32278), (1360, 16139)]