405990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{347}}^1$

素因数の和:373

約数の個数: 48

約数和(自身を含む): 1140048

約数和(自身を除く): 734058

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 30, 39, 45, 65, 78, 90, 117, 130, 195, 234, 347, 390, 585, 694, 1041, 1170, 1735, 2082, 3123, 3470, 4511, 5205, 6246, 9022, 10410, 13533, 15615, 22555, 27066, 31230, 40599, 45110, 67665, 81198, 135330, 202995, 405990]

約数ペア:

[(1, 405990), (2, 202995), (3, 135330), (5, 81198), (6, 67665), (9, 45110), (10, 40599), (13, 31230), (15, 27066), (18, 22555), (26, 15615), (30, 13533), (39, 10410), (45, 9022), (65, 6246), (78, 5205), (90, 4511), (117, 3470), (130, 3123), (195, 2082), (234, 1735), (347, 1170), (390, 1041), (585, 694)]