19937385

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{197}}^1$

素因数の和:394

約数の個数: 48

約数和(自身を含む): 37621584

約数和(自身を除く): 17684199

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 173, 195, 197, 519, 585, 591, 865, 985, 1557, 1773, 2249, 2561, 2595, 2955, 6747, 7683, 7785, 8865, 11245, 12805, 20241, 23049, 33735, 34081, 38415, 101205, 102243, 115245, 170405, 306729, 443053, 511215, 1329159, 1533645, 2215265, 3987477, 6645795, 19937385]

約数ペア:

[(1, 19937385), (3, 6645795), (5, 3987477), (9, 2215265), (13, 1533645), (15, 1329159), (39, 511215), (45, 443053), (65, 306729), (117, 170405), (173, 115245), (195, 102243), (197, 101205), (519, 38415), (585, 34081), (591, 33735), (865, 23049), (985, 20241), (1557, 12805), (1773, 11245), (2249, 8865), (2561, 7785), (2595, 7683), (2955, 6747)]