1991398930

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{269}}^1\times {\mathrm{829}}^1$

素因数の和:1171

約数の個数: 64

約数和(自身を含む): 3872448000

約数和(自身を除く): 1881049070

約数列:

[1, 2, 5, 10, 19, 38, 47, 94, 95, 190, 235, 269, 470, 538, 829, 893, 1345, 1658, 1786, 2690, 4145, 4465, 5111, 8290, 8930, 10222, 12643, 15751, 25286, 25555, 31502, 38963, 51110, 63215, 77926, 78755, 126430, 157510, 194815, 223001, 240217, 389630, 446002, 480434, 740297, 1115005, 1201085, 1480594, 2230010, 2402170, 3701485, 4237019, 7402970, 8474038, 10481047, 20962094, 21185095, 42370190, 52405235, 104810470, 199139893, 398279786, 995699465, 1991398930]

約数ペア:

[(1, 1991398930), (2, 995699465), (5, 398279786), (10, 199139893), (19, 104810470), (38, 52405235), (47, 42370190), (94, 21185095), (95, 20962094), (190, 10481047), (235, 8474038), (269, 7402970), (470, 4237019), (538, 3701485), (829, 2402170), (893, 2230010), (1345, 1480594), (1658, 1201085), (1786, 1115005), (2690, 740297), (4145, 480434), (4465, 446002), (5111, 389630), (8290, 240217), (8930, 223001), (10222, 194815), (12643, 157510), (15751, 126430), (25286, 78755), (25555, 77926), (31502, 63215), (38963, 51110)]