21265160

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{439}}^1$

素因数の和:630

約数の個数: 64

約数和(自身を含む): 55123200

約数和(自身を除く): 33858040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 173, 280, 346, 439, 692, 865, 878, 1211, 1384, 1730, 1756, 2195, 2422, 3073, 3460, 3512, 4390, 4844, 6055, 6146, 6920, 8780, 9688, 12110, 12292, 15365, 17560, 24220, 24584, 30730, 48440, 61460, 75947, 122920, 151894, 303788, 379735, 531629, 607576, 759470, 1063258, 1518940, 2126516, 2658145, 3037880, 4253032, 5316290, 10632580, 21265160]

約数ペア:

[(1, 21265160), (2, 10632580), (4, 5316290), (5, 4253032), (7, 3037880), (8, 2658145), (10, 2126516), (14, 1518940), (20, 1063258), (28, 759470), (35, 607576), (40, 531629), (56, 379735), (70, 303788), (140, 151894), (173, 122920), (280, 75947), (346, 61460), (439, 48440), (692, 30730), (865, 24584), (878, 24220), (1211, 17560), (1384, 15365), (1730, 12292), (1756, 12110), (2195, 9688), (2422, 8780), (3073, 6920), (3460, 6146), (3512, 6055), (4390, 4844)]