21721370

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{547}}^1$

素因数の和:603

約数の個数: 48

約数和(自身を含む): 45098208

約数和(自身を除く): 23376838

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 55, 95, 110, 190, 209, 361, 418, 547, 722, 1045, 1094, 1805, 2090, 2735, 3610, 3971, 5470, 6017, 7942, 10393, 12034, 19855, 20786, 30085, 39710, 51965, 60170, 103930, 114323, 197467, 228646, 394934, 571615, 987335, 1143230, 1974670, 2172137, 4344274, 10860685, 21721370]

約数ペア:

[(1, 21721370), (2, 10860685), (5, 4344274), (10, 2172137), (11, 1974670), (19, 1143230), (22, 987335), (38, 571615), (55, 394934), (95, 228646), (110, 197467), (190, 114323), (209, 103930), (361, 60170), (418, 51965), (547, 39710), (722, 30085), (1045, 20786), (1094, 19855), (1805, 12034), (2090, 10393), (2735, 7942), (3610, 6017), (3971, 5470)]