399536488

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{19501}}^1$

素因数の和:19717

約数の個数: 32

約数和(自身を含む): 810893160

約数和(自身を除く): 411356672

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 197, 394, 788, 1576, 2561, 5122, 10244, 19501, 20488, 39002, 78004, 156008, 253513, 507026, 1014052, 2028104, 3841697, 7683394, 15366788, 30733576, 49942061, 99884122, 199768244, 399536488]

約数ペア:

[(1, 399536488), (2, 199768244), (4, 99884122), (8, 49942061), (13, 30733576), (26, 15366788), (52, 7683394), (104, 3841697), (197, 2028104), (394, 1014052), (788, 507026), (1576, 253513), (2561, 156008), (5122, 78004), (10244, 39002), (19501, 20488)]