21920085

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{509}}^1$

素因数の和:563

約数の個数: 64

約数和(自身を含む): 44064000

約数和(自身を除く): 22143915

約数列:

[1, 3, 5, 9, 11, 15, 27, 29, 33, 45, 55, 87, 99, 135, 145, 165, 261, 297, 319, 435, 495, 509, 783, 957, 1305, 1485, 1527, 1595, 2545, 2871, 3915, 4581, 4785, 5599, 7635, 8613, 13743, 14355, 14761, 16797, 22905, 27995, 43065, 44283, 50391, 68715, 73805, 83985, 132849, 151173, 162371, 221415, 251955, 398547, 487113, 664245, 755865, 811855, 1461339, 1992735, 2435565, 4384017, 7306695, 21920085]

約数ペア:

[(1, 21920085), (3, 7306695), (5, 4384017), (9, 2435565), (11, 1992735), (15, 1461339), (27, 811855), (29, 755865), (33, 664245), (45, 487113), (55, 398547), (87, 251955), (99, 221415), (135, 162371), (145, 151173), (165, 132849), (261, 83985), (297, 73805), (319, 68715), (435, 50391), (495, 44283), (509, 43065), (783, 27995), (957, 22905), (1305, 16797), (1485, 14761), (1527, 14355), (1595, 13743), (2545, 8613), (2871, 7635), (3915, 5599), (4581, 4785)]