20554640

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{11171}}^1$

素因数の和:11207

約数の個数: 40

約数和(自身を含む): 49871808

約数和(自身を除く): 29317168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 11171, 22342, 44684, 55855, 89368, 111710, 178736, 223420, 256933, 446840, 513866, 893680, 1027732, 1284665, 2055464, 2569330, 4110928, 5138660, 10277320, 20554640]

約数ペア:

[(1, 20554640), (2, 10277320), (4, 5138660), (5, 4110928), (8, 2569330), (10, 2055464), (16, 1284665), (20, 1027732), (23, 893680), (40, 513866), (46, 446840), (80, 256933), (92, 223420), (115, 178736), (184, 111710), (230, 89368), (368, 55855), (460, 44684), (920, 22342), (1840, 11171)]