161788420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^2\times {\mathrm{311}}^1$

素因数の和:413

約数の個数: 72

約数和(自身を含む): 368746560

約数和(自身を除く): 206958140

約数列:

[1, 2, 4, 5, 10, 19, 20, 37, 38, 74, 76, 95, 148, 185, 190, 311, 370, 380, 622, 703, 740, 1244, 1369, 1406, 1555, 2738, 2812, 3110, 3515, 5476, 5909, 6220, 6845, 7030, 11507, 11818, 13690, 14060, 23014, 23636, 26011, 27380, 29545, 46028, 52022, 57535, 59090, 104044, 115070, 118180, 130055, 218633, 230140, 260110, 425759, 437266, 520220, 851518, 874532, 1093165, 1703036, 2128795, 2186330, 4257590, 4372660, 8089421, 8515180, 16178842, 32357684, 40447105, 80894210, 161788420]

約数ペア:

[(1, 161788420), (2, 80894210), (4, 40447105), (5, 32357684), (10, 16178842), (19, 8515180), (20, 8089421), (37, 4372660), (38, 4257590), (74, 2186330), (76, 2128795), (95, 1703036), (148, 1093165), (185, 874532), (190, 851518), (311, 520220), (370, 437266), (380, 425759), (622, 260110), (703, 230140), (740, 218633), (1244, 130055), (1369, 118180), (1406, 115070), (1555, 104044), (2738, 59090), (2812, 57535), (3110, 52022), (3515, 46028), (5476, 29545), (5909, 27380), (6220, 26011), (6845, 23636), (7030, 23014), (11507, 14060), (11818, 13690)]