20881190

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 44029440

約数和(自身を除く): 23148250

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 55, 95, 97, 103, 110, 190, 194, 206, 209, 418, 485, 515, 970, 1030, 1045, 1067, 1133, 1843, 1957, 2090, 2134, 2266, 3686, 3914, 5335, 5665, 9215, 9785, 9991, 10670, 11330, 18430, 19570, 19982, 20273, 21527, 40546, 43054, 49955, 99910, 101365, 107635, 109901, 189829, 202730, 215270, 219802, 379658, 549505, 949145, 1099010, 1898290, 2088119, 4176238, 10440595, 20881190]

約数ペア:

[(1, 20881190), (2, 10440595), (5, 4176238), (10, 2088119), (11, 1898290), (19, 1099010), (22, 949145), (38, 549505), (55, 379658), (95, 219802), (97, 215270), (103, 202730), (110, 189829), (190, 109901), (194, 107635), (206, 101365), (209, 99910), (418, 49955), (485, 43054), (515, 40546), (970, 21527), (1030, 20273), (1045, 19982), (1067, 19570), (1133, 18430), (1843, 11330), (1957, 10670), (2090, 9991), (2134, 9785), (2266, 9215), (3686, 5665), (3914, 5335)]