20612720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:294

約数の個数: 80

約数和(自身を含む): 51425280

約数和(自身を除く): 30812560

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 71, 76, 80, 95, 142, 152, 190, 191, 284, 304, 355, 380, 382, 568, 710, 760, 764, 955, 1136, 1349, 1420, 1520, 1528, 1910, 2698, 2840, 3056, 3629, 3820, 5396, 5680, 6745, 7258, 7640, 10792, 13490, 13561, 14516, 15280, 18145, 21584, 26980, 27122, 29032, 36290, 53960, 54244, 58064, 67805, 72580, 107920, 108488, 135610, 145160, 216976, 257659, 271220, 290320, 515318, 542440, 1030636, 1084880, 1288295, 2061272, 2576590, 4122544, 5153180, 10306360, 20612720]

約数ペア:

[(1, 20612720), (2, 10306360), (4, 5153180), (5, 4122544), (8, 2576590), (10, 2061272), (16, 1288295), (19, 1084880), (20, 1030636), (38, 542440), (40, 515318), (71, 290320), (76, 271220), (80, 257659), (95, 216976), (142, 145160), (152, 135610), (190, 108488), (191, 107920), (284, 72580), (304, 67805), (355, 58064), (380, 54244), (382, 53960), (568, 36290), (710, 29032), (760, 27122), (764, 26980), (955, 21584), (1136, 18145), (1349, 15280), (1420, 14516), (1520, 13561), (1528, 13490), (1910, 10792), (2698, 7640), (2840, 7258), (3056, 6745), (3629, 5680), (3820, 5396)]