128910440

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{2389}}^1$

素因数の和:2490

約数の個数: 64

約数和(自身を含む): 309744000

約数和(自身を除く): 180833560

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 71, 76, 95, 142, 152, 190, 284, 355, 380, 568, 710, 760, 1349, 1420, 2389, 2698, 2840, 4778, 5396, 6745, 9556, 10792, 11945, 13490, 19112, 23890, 26980, 45391, 47780, 53960, 90782, 95560, 169619, 181564, 226955, 339238, 363128, 453910, 678476, 848095, 907820, 1356952, 1696190, 1815640, 3222761, 3392380, 6445522, 6784760, 12891044, 16113805, 25782088, 32227610, 64455220, 128910440]

約数ペア:

[(1, 128910440), (2, 64455220), (4, 32227610), (5, 25782088), (8, 16113805), (10, 12891044), (19, 6784760), (20, 6445522), (38, 3392380), (40, 3222761), (71, 1815640), (76, 1696190), (95, 1356952), (142, 907820), (152, 848095), (190, 678476), (284, 453910), (355, 363128), (380, 339238), (568, 226955), (710, 181564), (760, 169619), (1349, 95560), (1420, 90782), (2389, 53960), (2698, 47780), (2840, 45391), (4778, 26980), (5396, 23890), (6745, 19112), (9556, 13490), (10792, 11945)]