21390435

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{547}}^1$

素因数の和:648

約数の個数: 48

約数和(自身を含む): 41034240

約数和(自身を除く): 19643805

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 79, 99, 165, 237, 395, 495, 547, 711, 869, 1185, 1641, 2607, 2735, 3555, 4345, 4923, 6017, 7821, 8205, 13035, 18051, 24615, 30085, 39105, 43213, 54153, 90255, 129639, 216065, 270765, 388917, 475343, 648195, 1426029, 1944585, 2376715, 4278087, 7130145, 21390435]

約数ペア:

[(1, 21390435), (3, 7130145), (5, 4278087), (9, 2376715), (11, 1944585), (15, 1426029), (33, 648195), (45, 475343), (55, 388917), (79, 270765), (99, 216065), (165, 129639), (237, 90255), (395, 54153), (495, 43213), (547, 39105), (711, 30085), (869, 24615), (1185, 18051), (1641, 13035), (2607, 8205), (2735, 7821), (3555, 6017), (4345, 4923)]