21016905

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{173}}^1$

素因数の和:290

約数の個数: 64

約数和(自身を含む): 42094080

約数和(自身を除く): 21077175

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 89, 91, 105, 173, 195, 267, 273, 445, 455, 519, 623, 865, 1157, 1211, 1335, 1365, 1869, 2249, 2595, 3115, 3471, 3633, 5785, 6055, 6747, 8099, 9345, 11245, 15397, 15743, 17355, 18165, 24297, 33735, 40495, 46191, 47229, 76985, 78715, 107779, 121485, 200161, 230955, 236145, 323337, 538895, 600483, 1000805, 1401127, 1616685, 3002415, 4203381, 7005635, 21016905]

約数ペア:

[(1, 21016905), (3, 7005635), (5, 4203381), (7, 3002415), (13, 1616685), (15, 1401127), (21, 1000805), (35, 600483), (39, 538895), (65, 323337), (89, 236145), (91, 230955), (105, 200161), (173, 121485), (195, 107779), (267, 78715), (273, 76985), (445, 47229), (455, 46191), (519, 40495), (623, 33735), (865, 24297), (1157, 18165), (1211, 17355), (1335, 15743), (1365, 15397), (1869, 11245), (2249, 9345), (2595, 8099), (3115, 6747), (3471, 6055), (3633, 5785)]