21000470

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1\times {\mathrm{199}}^1$

素因数の和:440

約数の個数: 32

約数和(自身を含む): 38836800

約数和(自身を除く): 17836330

約数列:

[1, 2, 5, 10, 61, 122, 173, 199, 305, 346, 398, 610, 865, 995, 1730, 1990, 10553, 12139, 21106, 24278, 34427, 52765, 60695, 68854, 105530, 121390, 172135, 344270, 2100047, 4200094, 10500235, 21000470]

約数ペア:

[(1, 21000470), (2, 10500235), (5, 4200094), (10, 2100047), (61, 344270), (122, 172135), (173, 121390), (199, 105530), (305, 68854), (346, 60695), (398, 52765), (610, 34427), (865, 24278), (995, 21106), (1730, 12139), (1990, 10553)]