255653840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{245821}}^1$

素因数の和:245847

約数の個数: 40

約数和(自身を含む): 640120488

約数和(自身を除く): 384466648

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 245821, 491642, 983284, 1229105, 1966568, 2458210, 3195673, 3933136, 4916420, 6391346, 9832840, 12782692, 15978365, 19665680, 25565384, 31956730, 51130768, 63913460, 127826920, 255653840]

約数ペア:

[(1, 255653840), (2, 127826920), (4, 63913460), (5, 51130768), (8, 31956730), (10, 25565384), (13, 19665680), (16, 15978365), (20, 12782692), (26, 9832840), (40, 6391346), (52, 4916420), (65, 3933136), (80, 3195673), (104, 2458210), (130, 1966568), (208, 1229105), (260, 983284), (520, 491642), (1040, 245821)]