20902090

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:247

約数の個数: 64

約数和(自身を含む): 44115840

約数和(自身を除く): 23213750

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 55, 73, 95, 110, 137, 146, 190, 209, 274, 365, 418, 685, 730, 803, 1045, 1370, 1387, 1507, 1606, 2090, 2603, 2774, 3014, 4015, 5206, 6935, 7535, 8030, 10001, 13015, 13870, 15070, 15257, 20002, 26030, 28633, 30514, 50005, 57266, 76285, 100010, 110011, 143165, 152570, 190019, 220022, 286330, 380038, 550055, 950095, 1100110, 1900190, 2090209, 4180418, 10451045, 20902090]

約数ペア:

[(1, 20902090), (2, 10451045), (5, 4180418), (10, 2090209), (11, 1900190), (19, 1100110), (22, 950095), (38, 550055), (55, 380038), (73, 286330), (95, 220022), (110, 190019), (137, 152570), (146, 143165), (190, 110011), (209, 100010), (274, 76285), (365, 57266), (418, 50005), (685, 30514), (730, 28633), (803, 26030), (1045, 20002), (1370, 15257), (1387, 15070), (1507, 13870), (1606, 13015), (2090, 10001), (2603, 8030), (2774, 7535), (3014, 6935), (4015, 5206)]