28723760

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:486

約数の個数: 80

約数和(自身を含む): 73120320

約数和(自身を除く): 44396560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 71, 80, 104, 130, 142, 208, 260, 284, 355, 389, 520, 568, 710, 778, 923, 1040, 1136, 1420, 1556, 1846, 1945, 2840, 3112, 3692, 3890, 4615, 5057, 5680, 6224, 7384, 7780, 9230, 10114, 14768, 15560, 18460, 20228, 25285, 27619, 31120, 36920, 40456, 50570, 55238, 73840, 80912, 101140, 110476, 138095, 202280, 220952, 276190, 359047, 404560, 441904, 552380, 718094, 1104760, 1436188, 1795235, 2209520, 2872376, 3590470, 5744752, 7180940, 14361880, 28723760]

約数ペア:

[(1, 28723760), (2, 14361880), (4, 7180940), (5, 5744752), (8, 3590470), (10, 2872376), (13, 2209520), (16, 1795235), (20, 1436188), (26, 1104760), (40, 718094), (52, 552380), (65, 441904), (71, 404560), (80, 359047), (104, 276190), (130, 220952), (142, 202280), (208, 138095), (260, 110476), (284, 101140), (355, 80912), (389, 73840), (520, 55238), (568, 50570), (710, 40456), (778, 36920), (923, 31120), (1040, 27619), (1136, 25285), (1420, 20228), (1556, 18460), (1846, 15560), (1945, 14768), (2840, 10114), (3112, 9230), (3692, 7780), (3890, 7384), (4615, 6224), (5057, 5680)]