19916560

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13103}}^1$

素因数の和:13135

約数の個数: 40

約数和(自身を含む): 48746880

約数和(自身を除く): 28830320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13103, 26206, 52412, 65515, 104824, 131030, 209648, 248957, 262060, 497914, 524120, 995828, 1048240, 1244785, 1991656, 2489570, 3983312, 4979140, 9958280, 19916560]

約数ペア:

[(1, 19916560), (2, 9958280), (4, 4979140), (5, 3983312), (8, 2489570), (10, 1991656), (16, 1244785), (19, 1048240), (20, 995828), (38, 524120), (40, 497914), (76, 262060), (80, 248957), (95, 209648), (152, 131030), (190, 104824), (304, 65515), (380, 52412), (760, 26206), (1520, 13103)]